Bump version to 6.0.0

extension/manifest.json

@@ -1,7 +1,7 @@
 {
   "name": "Speeder",
   "short_name": "Speeder",
-  "version": "5.3.6.1",
+  "version": "6.0.0",
   "manifest_version": 2,
   "description": "Speed up, slow down, advance and rewind HTML5 audio/video with shortcuts (New and improved version of \"Video Speed Controller\")",
   "homepage_url": "https://github.com/SoPat712/speeder",