Only minify CSS when watch: false. (#442)

Author: goto-bus-stop

lib/graph-style.js

@@ -17,15 +17,17 @@ function node (state, createEdge) {
   var bundle
 
   try {
-    bundle = purify(script, style, { minify: true })
+    bundle = purify(script, style)
   } catch (e) {
     this.emit('error', 'styles', 'purify-css', e)
   }
 
-  try {
-    bundle = clean.minify(bundle).styles
-  } catch (e) {
-    this.emit('error', 'styles', 'clean-css', e)
+  if (!state.metadata.watch) {
+    try {
+      bundle = clean.minify(bundle).styles
+    } catch (e) {
+      this.emit('error', 'styles', 'clean-css', e)
+    }
   }
 
   createEdge('bundle', Buffer.from(bundle), {