Remove exclusion of src/index.ts file

Author: ethanshar

tsconfig.build.json

@@ -4,5 +4,5 @@
     "emitDeclarationOnly": true
   },
   "include": ["src/**/*", "typings/**/*", "lib/components/*/*"],
-  "exclude": [ "node_modules", "src/index.ts"]
+  "exclude": [ "node_modules"]
 }