chore(lint): migrate from standard to neostandard & upgrade eslint to v9 (#2316)

.eslintignore

@@ -1,2 +0,0 @@
-pino.d.ts
-test/types/pino.test-d.ts

.eslintrc

@@ -1,8 +0,0 @@
-{
-    "extends": [
-        "standard"
-    ],
-    "rules": {
-        "no-var": "off"
-    }
-}

eslint.config.js

@@ -0,0 +1,19 @@
+'use strict'
+
+const { defineConfig, globalIgnores } = require('eslint/config')
+const neostandard = require('neostandard')
+
+module.exports = defineConfig([
+  neostandard({}),
+  globalIgnores([
+    'pino.d.ts',
+    'test/types/pino.test-d.ts',
+    'test/fixtures/syntax-error-esm.mjs',
+    'test/fixtures/ts/*cjs',
+  ]),
+  {
+    rules: {
+      'no-var': 'off',
+    },
+  },
+])

lib/tools.js

@@ -204,7 +204,6 @@ function _asJson (obj, msg, num, time) {
       case 'function':
         break
       case 'number':
-        /* eslint no-fallthrough: "off" */
         if (Number.isFinite(value) === false) {
           value = null
         }

package.json

@@ -71,8 +71,7 @@
     "bunyan": "^1.8.14",
     "debug": "^4.3.4",
     "docsify-cli": "^4.4.4",
-    "eslint": "^8.17.0",
+    "eslint": "^9.37.0",
-    "eslint-config-standard": "^17.0.0",
     "eslint-plugin-import": "^2.26.0",
     "eslint-plugin-n": "15.7.0",
     "eslint-plugin-node": "^11.1.0",
@@ -85,6 +84,7 @@
     "log": "^6.0.0",
     "loglevel": "^1.6.7",
     "midnight-smoker": "1.1.1",
+    "neostandard": "^0.12.2",
     "pino-pretty": "^13.0.0",
     "pre-commit": "^1.2.2",
     "proxyquire": "^2.1.3",