Enable TypeScript json module resolver (facebook#5531)

* Enable TypeScript json module resolver

* Update verifyTypeScriptSetup.js

Author: brunolemos

packages/react-scripts/config/react-app.d.ts

@@ -2,11 +2,6 @@
 // Do not edit this file. It's replaced every time you launch a toolbox action.
 // If you need to add additional declarations, please do so in a new file.
 
-declare module '*.json' {
-  const value: any;
-  export default value;
-}
-
 declare module '*.bmp' {
   const src: string;
   export default src;

packages/react-scripts/scripts/utils/verifyTypeScriptSetup.js

@@ -29,9 +29,10 @@ const compilerOptions = {
   allowSyntheticDefaultImports: { suggested: true },
   strict: { suggested: true },
 
-  // This values are required and cannot be changed by the user
+  // These values are required and cannot be changed by the user
   module: { value: 'esnext', reason: 'for import() and import/export' },
   moduleResolution: { value: 'node', reason: 'to match webpack resolution' },
+  resolveJsonModule: { value: true, reason: 'to match webpack loader' },
   isolatedModules: { value: true, reason: 'implementation limitation' },
   noEmit: { value: true },
   jsx: { value: 'preserve', reason: 'JSX is compiled by Babel' },