updated cov badge, disabled codecov comments

Signed-off-by: bigcat88 <bigcat88@icloud.com>

.github/.codecov.yml

@@ -1,6 +1,4 @@
-comment:
-  require_changes: true
-  layout: "diff, files"
+comment: false
 
 coverage:
   status:
@@ -8,7 +6,4 @@ coverage:
       default:
         target: auto
         threshold: 2%
-    patch:
-      default:
-        target: auto
-        threshold: 2%
+    patch: off

README.md

@@ -1,7 +1,7 @@
 # Nextcloud App Store
 
 [![Build Status](https://travis-ci.org/nextcloud/appstore.svg?branch=master)](https://travis-ci.org/nextcloud/appstore)
-[![Coverage Status](https://coveralls.io/repos/github/nextcloud/appstore/badge.svg)](https://coveralls.io/github/nextcloud/appstore)
+[![codecov](https://codecov.io/gh/nextcloud/appstore/branch/master/graph/badge.svg?token=ABLI0g5G9q)](https://codecov.io/gh/nextcloud/appstore)
 [![Documentation Status](https://readthedocs.org/projects/nextcloudappstore/badge/?version=latest)](http://nextcloudappstore.readthedocs.io/en/latest/?badge=latest)
 [![iRequirements Status](https://requires.io/github/nextcloud/appstore/requirements.svg?branch=master)](https://requires.io/github/nextcloud/appstore/requirements/?branch=master)
 [![Package.json Status](https://david-dm.org/nextcloud/appstore.svg)](https://david-dm.org/nextcloud/appstore)