fix(babel): fix ignore glob

Author: Kent C. Dodds

src/scripts/build/babel.js

@@ -18,7 +18,7 @@ const config = useBuiltinConfig
 
 const ignore = args.includes('--ignore')
   ? []
-  : ['--ignore', '__tests__,__mocks__']
+  : ['--ignore', '**/__tests__/**,**/__mocks__/**']
 
 const copyFiles = args.includes('--no-copy-files') ? [] : ['--copy-files']