Merge pull request #116 from thunderbird/support_esr153

Add support for esr153

Author: stephenking314

.github/update-config.json

@@ -4,7 +4,8 @@
     "comm-beta",
     "comm-release",
     "comm-esr128",
-    "comm-esr140"
+    "comm-esr140",
+    "comm-esr153"
   ],
   "head": "comm",
   "paths": [
@@ -14,4 +15,5 @@
     "mail/branding/thunderbird/locales",
     "mail/locales"
   ]
-}
+}
+