Disable default-case lint rule for TypeScript (#6937)

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

@@ -106,6 +106,8 @@ function verifyTypeScriptSetup() {
     allowSyntheticDefaultImports: { suggested: true },
     strict: { suggested: true },
     forceConsistentCasingInFileNames: { suggested: true },
+    // TODO: Enable for v4.0 (#6936)
+    // noFallthroughCasesInSwitch: { suggested: true },
 
     // These values are required and cannot be changed by the user
     // Keep this in sync with the webpack config
@@ -181,7 +183,7 @@ function verifyTypeScriptSetup() {
         )
       );
     }
-    
+
     console.log(e && e.message ? `${e.message}` : '');
     process.exit(1);
   }