Increased version number

Github Actions was reporting an issue with manifest.json version number. The version was increased in the previous commit, however it reported that it was not. The version has been increased from 1.5 to 2.0

public/manifest.json

@@ -2,7 +2,7 @@
   "name": "Canvas Strikethrough",
   "description": "Mark Canvas calendar events without deliverables as complete.",
   "author": "Daniel Stoiber",
-  "version": "1.5",
+  "version": "2.0",
   "manifest_version": 3,
   "permissions": [
     "storage"