Update branch protection

lib/rename-branch.js

@@ -30,6 +30,34 @@ async function renameBranch (octokit, { owner, repo, current_name: currentName,
     default_branch: name
   })
 
+  // update branch protection patterns
+  const query = `{
+    repository(owner:"${owner}",name:"${repo}") {
+      branchProtectionRules(first:100) {
+        nodes {
+          id
+          pattern
+        }
+      }
+    }
+  }`
+  const {
+    data: { data: { repository: { branchProtectionRules: { nodes: branchProtectionRules } } } }
+  } = await octokit.request('POST /graphql', { query })
+
+  // there can only be one protection per pattern
+  const { id } = branchProtectionRules.find(rule => rule.pattern === currentName)
+  await octokit.request('POST /graphql', {
+    query: `mutation {
+      updateBranchProtectionRule (input:{branchProtectionRuleId:"${id}",pattern:"${name}"}) {
+        branchProtectionRule {
+          id,
+          pattern
+        }
+      }
+    }`
+  })
+
   // Iterate trough all open pull requests with base = <currentName>
   // and change base to <name>
   const options = octokit.pullRequests.list.endpoint.merge({