also redirect i.reddit.com

Closes https://github.com/tom-james-watson/old-reddit-redirect/issues/45

background.js

@@ -19,6 +19,7 @@ chrome.webRequest.onBeforeRequest.addListener(
       "*://www.reddit.com/*",
       "*://np.reddit.com/*",
       "*://amp.reddit.com/*",
+      "*://i.reddit.com/*",
     ],
     types: [
       "main_frame",

manifest.json

@@ -1,7 +1,7 @@
 {
   "name": "Old Reddit Redirect",
   "description": "Ensure Reddit always loads the old design",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "manifest_version": 2,
   "background": { "scripts": ["background.js"] },
   "icons": {
@@ -14,6 +14,7 @@
     "*://reddit.com/*",
     "*://www.reddit.com/*",
     "*://np.reddit.com/*",
-    "*://amp.reddit.com/*"
+    "*://amp.reddit.com/*",
+    "*://i.reddit.com/*"
   ]
 }