Chore: update eslintrc

Author: JPeer264

.eslintrc.js

@@ -1,18 +1,46 @@
 module.exports = {
-    "extends": "airbnb-base",
-    "plugins": [
-        "import"
+    env: {
+        browser: true,
+        es6: true,
+        jest: true,
+    },
+    extends: [
+        'plugin:@typescript-eslint/recommended',
+        'airbnb-base'
     ],
-    "parserOptions": {
-        "ecmaFeatures": {
-            "jsx": true
-        }
+    plugins: ['@typescript-eslint'],
+    parser: '@typescript-eslint/parser',
+    globals: {
+        Atomics: 'readonly',
+        SharedArrayBuffer: 'readonly',
+    },
+    parserOptions: {
+        ecmaVersion: 2018,
+        sourceType: 'module',
     },
-    "rules": {
-        // disabled until babel rewrite
-        "strict": 1,
-        "no-param-reassign": 1,
-        "max-len": 1,
-        "no-shadow": 1,
+    settings: {
+        'import/resolver': {
+            node: {
+                extensions: ['.js', '.ts'],
+            },
+        },
+    },
+    overrides: [
+        {
+            files: ['*.ts', '*.tsx'],
+            rules: {
+                'no-dupe-class-members': 'off',
+            },
+        },
+    ],
+    rules: {
+        '@typescript-eslint/explicit-function-return-type': ['warn', {
+            allowTypedFunctionExpressions: true,
+            allowExpressions: true,
+        }],
+        'import/extensions': ['error', 'ignorePackages', {
+            js: 'never',
+            ts: 'never',
+        }],
     }
 };

package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "test": "nyc ava -s",
     "build": "tsc && babel dest -d dest",
-    "lint": "eslint lib index.js test",
+    "lint": "eslint lib test",
     "fix": "npm run lint -- --fix",
     "prepublish": "npm run build",
     "coveralls": "nyc report --reporter=text-lcov | coveralls"