Add @babel/eslint-plugin (#187)

Closes #186.

.eslintrc.base.js

@@ -23,7 +23,7 @@ module.exports = {
     ),
   ],
   parserOptions: {
-    parser: "babel-eslint",
+    parser: "@babel/eslint-parser",
     ecmaVersion: 2018,
     sourceType: "script",
     // Needed for the lint-verify-fail.test.js test.
@@ -63,9 +63,10 @@ module.exports = {
     "unicorn/prefer-module": "off",
     "unicorn/prefer-spread": "off",
     "unicorn/prevent-abbreviations": "off",
-    // Force a conflict with Prettier in test-lint/babel.js.
+    // Force a conflict with Prettier in test-lint/@babel.js. and test-lint/babel.js.
     "object-curly-spacing": "off",
     "babel/object-curly-spacing": ["error", "never"],
+    "@babel/object-curly-spacing": ["error", "never"],
   },
   overrides: [
     {

README.md

@@ -60,6 +60,7 @@ Then, add `"prettier"` to the "extends" array in your `.eslintrc.*` file. Make s
 That’s it! Extending `"prettier"` turns off a bunch of core ESLint rules, as well as a few rules from these plugins:
 
 - [@typescript-eslint/eslint-plugin]
+- [@babel/eslint-plugin]
 - [eslint-plugin-babel]
 - [eslint-plugin-flowtype]
 - [eslint-plugin-react]
@@ -655,6 +656,7 @@ eslint-config-prettier has been tested with:
   - eslint-config-prettier 2.10.0 and older were tested with ESLint 4.x
   - eslint-config-prettier 2.1.1 and older were tested with ESLint 3.x
 - prettier 2.2.1
+- @babel/eslint-plugin 7.13.16
 - @typescript-eslint/eslint-plugin 4.22.0
 - eslint-plugin-babel 5.3.1
 - eslint-plugin-flowtype 5.7.2
@@ -710,6 +712,7 @@ When you’re done, run `npm test` to verify that you got it all right. It runs
 
 [MIT](LICENSE).
 
+[@babel/eslint-plugin]: https://github.com/babel/babel/tree/main/eslint/babel-eslint-plugin
 [@typescript-eslint/eslint-plugin]: https://github.com/typescript-eslint/typescript-eslint
 [@typescript-eslint/quotes]: https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/quotes.md
 [arrow-body-style]: https://eslint.org/docs/rules/arrow-body-style

babel.config.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["@babel/plugin-syntax-jsx", "@babel/plugin-syntax-flow"]
+}

index.js

@@ -92,6 +92,8 @@ module.exports = {
     "wrap-iife": "off",
     "wrap-regex": "off",
     "yield-star-spacing": "off",
+    "@babel/object-curly-spacing": "off",
+    "@babel/semi": "off",
     "@typescript-eslint/brace-style": "off",
     "@typescript-eslint/comma-dangle": "off",
     "@typescript-eslint/comma-spacing": "off",

package.json

@@ -14,9 +14,12 @@
     "build": "node scripts/build.js"
   },
   "devDependencies": {
+    "@babel/eslint-parser": "7.13.14",
+    "@babel/eslint-plugin": "7.13.16",
+    "@babel/plugin-syntax-flow": "7.12.13",
+    "@babel/plugin-syntax-jsx": "7.12.13",
     "@typescript-eslint/eslint-plugin": "4.22.0",
     "@typescript-eslint/parser": "4.22.0",
-    "babel-eslint": "10.1.0",
     "doctoc": "2.0.0",
     "eslint": "7.25.0",
     "eslint-config-google": "0.14.0",

test-lint/@babel.js

@@ -0,0 +1,6 @@
+/* eslint-disable quotes, babel/object-curly-spacing */
+"use strict";
+
+// Prettier wants spacing between curly braces, but
+// `@babel/object-curly-spacing` doesn’t.
+module.exports = { foo: "bar" };

test-lint/babel.js

@@ -1,4 +1,4 @@
-/* eslint-disable quotes */
+/* eslint-disable quotes, @babel/object-curly-spacing */
 "use strict";
 
 // Prettier wants spacing between curly braces, but `babel/object-curly-spacing`