Fix manifest.json

Author: fuyutarow

package.json

@@ -1,6 +1,6 @@
 {
   "name": "github-readme-stats-extension",
-  "version": "1.2021.1",
+  "version": "1.2021.2",
   "description": "",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",

public/manifest.json

@@ -2,7 +2,7 @@
   "name": "Github Readme Stats Extension",
   "description": "GitHub Readme Stats, a visualization of the user characteristics of your GitHub account, is now available as an extension",
   "manifest_version": 2,
-  "version": "1.2021.1",
+  "version": "1.2021.2",
   "icons": {
     "16": "icons/16x16.png",
     "48": "icons/48x48.png",
@@ -18,6 +18,7 @@
   "permissions": [
     "https://github.com/*",
     "https://gist.github.com/*",
-    "activeTab"
+    "activeTab",
+    "tabs"
   ]
 }