configure eslint and add yarn lint script

Author: James Fox

.eslintrc.js

@@ -6,6 +6,13 @@ module.exports = {
     ecmaVersion: 2017,
     sourceType: 'module',
   },
+  env: {
+    browser: true,
+    es6: true,
+    jest: true,
+    mocha: true,
+    node: true,
+  },
   extends: [
     'eslint:recommended',
     'plugin:@typescript-eslint/recommended',
@@ -15,4 +22,9 @@ module.exports = {
     'plugin:prettier/recommended',
     'prettier/react',
   ],
+  rules: {
+    '@typescript-eslint/ban-ts-ignore': 'off',
+    '@typescript-eslint/camelcase': 'off',
+    '@typescript-eslint/no-empty-function': 'off',
+  },
 };

package.json

@@ -20,7 +20,7 @@
   "scripts": {
     "tsc": "rm -rf lib/ && tsc",
     "build": "rm -rf dist/ && node ./scripts/build.js",
-    "lint": "tsc --noEmit && eslint '*/**/*.{js,ts,tsx}' --quiet --fix",
+    "lint": "tsc --noEmit && eslint 'src/**/*.{js,ts,tsx}' --quiet --fix",
     "test": "jest --silent",
     "prepublishOnly": "npm run test && npm run build"
   },