resume bundleStream after attaching cache hooks

Author: olegskl

lib/BrowserifyCache.js

@@ -83,7 +83,7 @@ function attachCacheHooksToPipeline(b) {
       proxyEvent(bundleStream, outputStream, 'package');
       proxyEvent(bundleStream, outputStream, 'transform');
       proxyEvent(bundleStream, outputStream, 'error');
-      bundleStream.pipe(outputStream);
+      bundleStream.pipe(outputStream).resume();
     });
 
     return outputStream;