Bump extension version to 4.0.1

Author: ReeceHumphreys

package.json

@@ -3,7 +3,7 @@
   "displayName": "Slice",
   "description": "Provides support for Slice syntax highlighting.",
   "icon": "images/icon.png",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "publisher": "ZeroCInc",
   "license": "BSD-3-Clause",
   "engines": {