Changed: higher timeout for watch test

In order to avoid
```
Error: ENOENT, no such file or directory
'test/fixtures/cli.output--watch-import.css’
```

Author: MoOx

test/cli.js

@@ -193,7 +193,7 @@ test("cli", function(t) {
           }, 2000)
         }, 2000)
       }, 2000)
-    }, 2000)
+    }, 4000)
 
     planned+=3
   }