Bump mapbox-gl dep to 0.50.0 (#618)

package.json

@@ -43,12 +43,12 @@
   "dependencies": {
     "@babel/runtime": "^7.0.0",
     "bowser": "^1.2.0",
-    "mapbox-gl": "0.47.0",
+    "mapbox-gl": "~0.50.0",
     "math.gl": "^2.0.0",
     "mjolnir.js": "^2.0.0-alpha.1",
     "prop-types": "^15.5.7",
     "react-virtualized-auto-sizer": "^1.0.2",
-    "viewport-mercator-project": "^5.1.0"
+    "viewport-mercator-project": "^6.0.0"
   },
   "devDependencies": {
     "@babel/cli": "^7.0.0",
@@ -73,9 +73,9 @@
     "pre-commit": "^1.2.2",
     "probe.gl": "^1.0.0-alpha.11",
     "puppeteer": "^1.2.0",
-    "react": "^16.0.0",
-    "react-dom": "^16.0.0",
-    "react-test-renderer": "^16.0.0",
+    "react": "^16.3.0",
+    "react-dom": "^16.3.0",
+    "react-test-renderer": "^16.3.0",
     "sinon": "4.1.3",
     "source-map-loader": "^0.2.3",
     "tap-browser-color": "^0.1.2",