diff --git a/package.json b/package.json
index fcf64c588..12aa3e9e2 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "babelify": "babel src --out-dir lib",
     "prepare": "npm run babelify && babel-node src/build.js",
     "style": "eslint .",
-    "test": "jest && eslint . && nsp check"
+    "test": "jest && eslint ."
   },
   "devDependencies": {
     "babel-cli": "^6.6.5",
@@ -37,7 +37,6 @@
     "eslint-config-prettier": "^2.7.0",
     "eslint-plugin-prettier": "^2.3.1",
     "jest": "^23.6.0",
-    "nsp": "^3.2.1",
     "prettier": "^1.7.4",
     "rimraf": "^2.6.1"
   },
diff --git a/yarn.lock b/yarn.lock
index 298e41c74..e7ea93c84 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -68,13 +68,6 @@ acorn@^6.0.1:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.0.2.tgz#6a459041c320ab17592c6317abbfdf4bbaa98ca4"
   integrity sha512-GXmKIvbrN3TV7aVqAzVFaMW8F8wzVX7voEBRO3bDA64+EX37YSayggRJP5Xig6HYHBkWKpFg9W5gg6orklubhg==
 
-agent-base@^4.1.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.2.0.tgz#9838b5c3392b962bad031e6a4c5e1024abec45ce"
-  integrity sha512-c+R/U5X+2zz2+UCrCFv6odQzJdoqI+YecuhnAJLa1zYaMc13zPfwMwZrr91Pd1DYNo/yPRbiM4WVf9whgwFsIg==
-  dependencies:
-    es6-promisify "^5.0.0"
-
 ajv-keywords@^2.1.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-2.1.1.tgz#617997fc5f60576894c435f940d819e135b80762"
@@ -1114,13 +1107,6 @@ binary-extensions@^1.0.0:
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.11.0.tgz#46aa1751fb6a2f93ee5e689bb1087d4b14c6c205"
   integrity sha1-RqoXUftqL5PuXmibsQh9SxTGwgU=
 
-boom@5.x.x:
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/boom/-/boom-5.2.0.tgz#5dd9da6ee3a5f302077436290cb717d3f4a54e02"
-  integrity sha512-Z5BTk6ZRe4tXXQlkqftmsAUANpXmuwlsF5Oov8ThoMbQRzdGTA1ngYRW160GexgOgjsFOKJz0LYhoNi+2AMBUw==
-  dependencies:
-    hoek "4.x.x"
-
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
@@ -1362,16 +1348,6 @@ cli-cursor@^2.1.0:
   dependencies:
     restore-cursor "^2.0.0"
 
-cli-table2@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/cli-table2/-/cli-table2-0.2.0.tgz#2d1ef7f218a0e786e214540562d4bd177fe32d97"
-  integrity sha1-LR738hig54biFFQFYtS9F3/jLZc=
-  dependencies:
-    lodash "^3.10.1"
-    string-width "^1.0.1"
-  optionalDependencies:
-    colors "^1.1.2"
-
 cli-width@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-2.2.0.tgz#ff19ede8a9a5e579324147b0c11f0fbcbabed639"
@@ -1386,15 +1362,6 @@ cliui@^2.1.0:
     right-align "^0.1.1"
     wordwrap "0.0.2"
 
-cliui@^3.2.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/cliui/-/cliui-3.2.0.tgz#120601537a916d29940f934da3b48d585a39213d"
-  integrity sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=
-  dependencies:
-    string-width "^1.0.1"
-    strip-ansi "^3.0.1"
-    wrap-ansi "^2.0.0"
-
 cliui@^4.0.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/cliui/-/cliui-4.1.0.tgz#348422dbe82d800b3022eef4f6ac10bf2e4d1b49"
@@ -1434,11 +1401,6 @@ color-name@^1.1.1:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
   integrity sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=
 
-colors@^1.1.2:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/colors/-/colors-1.3.0.tgz#5f20c9fef6945cb1134260aab33bfbdc8295e04e"
-  integrity sha512-EDpX3a7wHMWFA7PUHWPHNWqOxIIRSJetuwl0AS5Oi/5FMV8kWm69RTlgm00GKjBO1xFHMtBbL49yRtMMdticBw==
-
 combined-stream@^1.0.6, combined-stream@~1.0.6:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.7.tgz#2d1d24317afb8abe95d6d2c0b07b57813539d828"
@@ -1527,11 +1489,6 @@ cssstyle@^1.0.0:
   dependencies:
     cssom "0.3.x"
 
-cvss@^1.0.2:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/cvss/-/cvss-1.0.3.tgz#70df9c4a4e07fdb9341f27a2847a21df25c3a83a"
-  integrity sha512-1FfNhEFVfeC+fgZpEr6oCOOTXifJicZS+Lq/mmUKI4Om+2O8zYspc/uhw51He+CTM5givI1dqIw5JUqyi1BWtA==
-
 dashdash@^1.12.0:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/dashdash/-/dashdash-1.14.1.tgz#853cfa0f7cbe2fed5de20326b8dd581035f6e2f0"
@@ -1733,18 +1690,6 @@ es-to-primitive@^1.1.1:
     is-date-object "^1.0.1"
     is-symbol "^1.0.2"
 
-es6-promise@^4.0.3:
-  version "4.2.4"
-  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.4.tgz#dc4221c2b16518760bd8c39a52d8f356fc00ed29"
-  integrity sha512-/NdNZVJg+uZgtm9eS3O6lrOLYmQag2DjdEXuPaHlZ6RuVqgqaVZfgYCepEIKsLqwdQArOPtC3XzRLqGGfT8KQQ==
-
-es6-promisify@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/es6-promisify/-/es6-promisify-5.0.0.tgz#5109d62f3e56ea967c4b63505aef08291c8a5203"
-  integrity sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=
-  dependencies:
-    es6-promise "^4.0.3"
-
 escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
@@ -2089,7 +2034,7 @@ find-up@^1.0.0:
     path-exists "^2.0.0"
     pinkie-promise "^2.0.0"
 
-find-up@^2.0.0, find-up@^2.1.0:
+find-up@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-2.1.0.tgz#45d1b7e506c717ddd482775a2b77920a3c0c57a7"
   integrity sha1-RdG35QbHF93UgndaK3eSCjwMV6c=
@@ -2377,11 +2322,6 @@ has@^1.0.1:
   dependencies:
     function-bind "^1.1.1"
 
-hoek@4.x.x:
-  version "4.2.1"
-  resolved "https://registry.yarnpkg.com/hoek/-/hoek-4.2.1.tgz#9634502aa12c445dd5a7c5734b572bb8738aacbb"
-  integrity sha512-QLg82fGkfnJ/4iy1xZ81/9SIJiq1NGFUMGs6ParyjBZr6jW2Ufj/snDqTHixNlHdPNwN2RLVD0Pi3igeK9+JfA==
-
 home-or-tmp@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/home-or-tmp/-/home-or-tmp-2.0.0.tgz#e36c3f2d2cae7d746a857e38d18d5f32a7882db8"
@@ -2411,14 +2351,6 @@ http-signature@~1.2.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
-https-proxy-agent@^2.1.0:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.1.tgz#51552970fa04d723e04c56d04178c3f92592bbc0"
-  integrity sha512-HPCTS1LW51bcyMYbxUIOO4HEOlQ1/1qRaFWcyxvwaqUS9TY88aoEuHUY33kuAh1YhVVaDQhLZsnPd+XNARWZlQ==
-  dependencies:
-    agent-base "^4.1.0"
-    debug "^3.1.0"
-
 iconv-lite@0.4.19:
   version "0.4.19"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.19.tgz#f7468f60135f5e5dad3399c0a81be9a1603a082b"
@@ -2486,7 +2418,7 @@ ini@~1.3.0:
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
   integrity sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==
 
-inquirer@^3.0.6, inquirer@^3.3.0:
+inquirer@^3.0.6:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-3.3.0.tgz#9dd2f2ad765dcab1ff0443b491442a20ba227dc9"
   integrity sha512-h+xtnyk4EwKvFWHrUYsWErEVR+igKtLdchu+o0Z1RL7VU/jVMFbYir2bp6bAj8efFNxWqHX0dIss6fJQ+/+qeQ==
@@ -3406,16 +3338,6 @@ load-json-file@^1.0.0:
     pinkie-promise "^2.0.0"
     strip-bom "^2.0.0"
 
-load-json-file@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-2.0.0.tgz#7947e42149af80d696cbf797bcaabcfe1fe29ca8"
-  integrity sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=
-  dependencies:
-    graceful-fs "^4.1.2"
-    parse-json "^2.2.0"
-    pify "^2.0.0"
-    strip-bom "^3.0.0"
-
 locate-path@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-2.0.0.tgz#2b568b265eec944c6d9c0de9c3dbbbca0354cd8e"
@@ -3434,11 +3356,6 @@ lodash.toarray@^4.4.0:
   resolved "https://registry.yarnpkg.com/lodash.toarray/-/lodash.toarray-4.4.0.tgz#24c4bfcd6b2fba38bfd0594db1179d8e9b656561"
   integrity sha1-JMS/zWsvuji/0FlNsRedjptlZWE=
 
-lodash@^3.10.1:
-  version "3.10.1"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
-  integrity sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=
-
 lodash@^4.13.1:
   version "4.17.11"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
@@ -3723,11 +3640,6 @@ node-releases@^1.0.1:
   dependencies:
     semver "^5.3.0"
 
-nodesecurity-npm-utils@^6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/nodesecurity-npm-utils/-/nodesecurity-npm-utils-6.0.0.tgz#5fb5974008c0c97a5c01844faa8fd3fc5520806c"
-  integrity sha512-NLRle1woNaT2orR6fue2jNqkhxDTktgJj3sZxvR/8kp21pvOY7Gwlx5wvo0H8ZVPqdgd2nE2ADB9wDu5Cl8zNg==
-
 nopt@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/nopt/-/nopt-4.0.1.tgz#d0d4685afd5415193c8c7505602d0d17cd64474d"
@@ -3788,21 +3700,6 @@ npmlog@^4.0.2:
     gauge "~2.7.3"
     set-blocking "~2.0.0"
 
-nsp@^3.2.1:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/nsp/-/nsp-3.2.1.tgz#0f540f8e85851e4ad370b14d5001098046dedfd1"
-  integrity sha512-dLmGi7IGixJEHKetErIH460MYiYIzAoxuVsloZFu9e1p9U8K0yULx7YQ1+VzrjZbB+wqq67ES1SfOvKVb/qMDQ==
-  dependencies:
-    chalk "^2.1.0"
-    cli-table2 "^0.2.0"
-    cvss "^1.0.2"
-    https-proxy-agent "^2.1.0"
-    inquirer "^3.3.0"
-    nodesecurity-npm-utils "^6.0.0"
-    semver "^5.4.1"
-    wreck "^12.5.1"
-    yargs "^9.0.1"
-
 num2fraction@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/num2fraction/-/num2fraction-1.2.2.tgz#6f682b6a027a4e9ddfa4564cd2589d1d4e669ede"
@@ -4034,13 +3931,6 @@ path-type@^1.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
-path-type@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/path-type/-/path-type-2.0.0.tgz#f012ccb8415b7096fc2daa1054c3d72389594c73"
-  integrity sha1-8BLMuEFbcJb8LaoQVMPXI4lZTHM=
-  dependencies:
-    pify "^2.0.0"
-
 perfectionist@^2.4.0:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/perfectionist/-/perfectionist-2.4.0.tgz#c147ad3714e126467f1764129ee72df861d47ea0"
@@ -4291,14 +4181,6 @@ read-pkg-up@^1.0.1:
     find-up "^1.0.0"
     read-pkg "^1.0.0"
 
-read-pkg-up@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-2.0.0.tgz#6b72a8048984e0c41e79510fd5e9fa99b3b549be"
-  integrity sha1-a3KoBImE4MQeeVEP1en6mbO1Sb4=
-  dependencies:
-    find-up "^2.0.0"
-    read-pkg "^2.0.0"
-
 read-pkg@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-1.1.0.tgz#f5ffaa5ecd29cb31c0474bca7d756b6bb29e3f28"
@@ -4308,15 +4190,6 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
-read-pkg@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-2.0.0.tgz#8ef1c0623c6a6db0dc6713c4bfac46332b2368f8"
-  integrity sha1-jvHAYjxqbbDcZxPEv6xGMysjaPg=
-  dependencies:
-    load-json-file "^2.0.0"
-    normalize-package-data "^2.3.2"
-    path-type "^2.0.0"
-
 readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.6, readable-stream@^2.2.2:
   version "2.3.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
@@ -4610,7 +4483,7 @@ sax@^1.2.4:
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
 
-"semver@2 || 3 || 4 || 5", semver@^5.3.0, semver@^5.4.1:
+"semver@2 || 3 || 4 || 5", semver@^5.3.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
   integrity sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==
@@ -4889,7 +4762,7 @@ strip-ansi@^4.0.0:
   dependencies:
     ansi-regex "^3.0.0"
 
-strip-bom@3.0.0, strip-bom@^3.0.0:
+strip-bom@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-3.0.0.tgz#2334c18e9c759f7bdd56fdef7e9ae3d588e68ed3"
   integrity sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=
@@ -5310,14 +5183,6 @@ wrappy@1:
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
   integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
 
-wreck@^12.5.1:
-  version "12.5.1"
-  resolved "https://registry.yarnpkg.com/wreck/-/wreck-12.5.1.tgz#cd2ffce167449e1f0242ed9cf80552e20fb6902a"
-  integrity sha512-l5DUGrc+yDyIflpty1x9XuMj1ehVjC/dTbF3/BasOO77xk0EdEa4M/DuOY8W88MQDAD0fEDqyjc8bkIMHd2E9A==
-  dependencies:
-    boom "5.x.x"
-    hoek "4.x.x"
-
 write-file-atomic@^2.1.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/write-file-atomic/-/write-file-atomic-2.3.0.tgz#1ff61575c2e2a4e8e510d6fa4e243cce183999ab"
@@ -5366,13 +5231,6 @@ yallist@^3.0.0, yallist@^3.0.2:
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.0.2.tgz#8452b4bb7e83c7c188d8041c1a837c773d6d8bb9"
   integrity sha1-hFK0u36Dx8GI2AQcGoN8dz1ti7k=
 
-yargs-parser@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-7.0.0.tgz#8d0ac42f16ea55debd332caf4c4038b3e3f5dfd9"
-  integrity sha1-jQrELxbqVd69MyyvTEA4s+P139k=
-  dependencies:
-    camelcase "^4.1.0"
-
 yargs-parser@^9.0.2:
   version "9.0.2"
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-9.0.2.tgz#9ccf6a43460fe4ed40a9bb68f48d43b8a68cc077"
@@ -5398,25 +5256,6 @@ yargs@^11.0.0:
     y18n "^3.2.1"
     yargs-parser "^9.0.2"
 
-yargs@^9.0.1:
-  version "9.0.1"
-  resolved "https://registry.yarnpkg.com/yargs/-/yargs-9.0.1.tgz#52acc23feecac34042078ee78c0c007f5085db4c"
-  integrity sha1-UqzCP+7Kw0BCB47njAwAf1CF20w=
-  dependencies:
-    camelcase "^4.1.0"
-    cliui "^3.2.0"
-    decamelize "^1.1.1"
-    get-caller-file "^1.0.1"
-    os-locale "^2.0.0"
-    read-pkg-up "^2.0.0"
-    require-directory "^2.1.1"
-    require-main-filename "^1.0.1"
-    set-blocking "^2.0.0"
-    string-width "^2.0.0"
-    which-module "^2.0.0"
-    y18n "^3.2.1"
-    yargs-parser "^7.0.0"
-
 yargs@~3.10.0:
   version "3.10.0"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-3.10.0.tgz#f7ee7bd857dd7c1d2d38c0e74efbd681d1431fd1"