Web extension version bump -> 3.3.0

Author: Brian Vaughn

shells/chrome/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 2,
   "name": "React Developer Tools",
   "description": "Adds React debugging tools to the Chrome Developer Tools.",
-  "version": "3.2.4",
+  "version": "3.3.0",
 
   "minimum_chrome_version": "49",
 

shells/firefox/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 2,
   "name": "React Developer Tools",
   "description": "Adds React debugging tools to the Firefox Developer Tools.",
-  "version": "3.2.4",
+  "version": "3.3.0",
 
   "applications": {
     "gecko": {