Add missing extensions to config.resolve

Add extensions to resolve from type script.

Author: David Paz

lib/config-generator.js

@@ -67,8 +67,13 @@ class ConfigGenerator {
 
         config.stats = this.buildStatsConfig();
 
+        let extensions = ['.js', '.jsx'];
+        if (this.webpackConfig.useTypeScriptLoader) {
+            extensions = extensions.concat(['.json', '.ts', '.tsx']);
+        }
+
         config.resolve = {
-            extensions: ['.js', '.jsx']
+            extensions: extensions
         };
 
         return config;