Fix master branch protection

See: repository-settings/app#150 (comment)

.github/settings.yml

@@ -32,18 +32,12 @@ collaborators:
 branches:
   - name: master
     protection:
+      # Required. Require at least one approving review on a pull request, before merging. Set to null to disable.
       required_pull_request_reviews:
+        # The number of approvals required. (1-6)
         required_approving_review_count: 1
+        # Dismiss approved reviews automatically when a new commit is pushed.
         dismiss_stale_reviews: true
-        require_code_owner_reviews: true
-        dismissal_restrictions:
-          users: []
-          teams: []
-      required_status_checks:
-        strict: true
-        contexts: ['YAML lint']
-      enforce_admins: true
-      restrictions:
-        apps: []
-        users: []
-        teams: []
+      required_status_checks: null
+      restrictions: null
+      enforce_admins: null