⏪ Revert "💚 Remove Appveyor cache for fixing build."

This reverts commit 37c3f2b

Author: kayo5994

UI_dev/qmui_web/appveyor.yml

@@ -36,5 +36,5 @@ test_script:
 build: off
 
 cache:
-#  - C:\Users\appveyor\AppData\Roaming\npm-cache -> package.json # npm cache
-#  - node_modules -> package.json                                # local npm modules
+  - C:\Users\appveyor\AppData\Roaming\npm-cache -> package.json # npm cache
+  - node_modules -> package.json                                # local npm modules