refactor: Update eslint (#563)

Author: dblythy

.eslintrc.json

@@ -0,0 +1,26 @@
+export default [
+  {
+    files: ['**/*.js'], // Apply to JavaScript files.
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: 'module',
+      globals: {
+        Parse: 'readonly', // Define global variables here.
+      },
+    },
+    rules: {
+      indent: ['error', 2, { SwitchCase: 1 }],
+      'linebreak-style': ['error', 'unix'],
+      'no-trailing-spaces': 'error',
+      'eol-last': 'error',
+      'space-in-parens': ['error', 'never'],
+      'no-multiple-empty-lines': 'warn',
+      'prefer-const': 'error',
+      'space-infix-ops': 'error',
+      'no-useless-escape': 'off',
+      'require-atomic-updates': 'off',
+      'no-var': 'warn',
+      'no-await-in-loop': 'warn',
+    },
+  },
+];