fix(eslint-config): don't use .eslintrc and set parser settings (#29109)

Author: pieh

packages/gatsby/src/utils/eslint-config.ts

@@ -7,7 +7,15 @@ const eslintRequirePreset = require.resolve(`./eslint/required`)
 
 export const eslintRequiredConfig: CLIEngine.Options = {
   rulePaths: [eslintRulePaths],
+  useEslintrc: false,
   baseConfig: {
+    parserOptions: {
+      ecmaVersion: 2018,
+      sourceType: `module`,
+      ecmaFeatures: {
+        jsx: true,
+      },
+    },
     globals: {
       graphql: true,
       __PATH_PREFIX__: true,