Run danger on forked PR

.github/workflows/danger.yml

@@ -0,0 +1,33 @@
+name: danger
+on:
+  pull_request_target:
+    types:
+      - opened
+      - synchronized
+      - reopened
+jobs:
+  danger:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+      statuses: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          path: default
+      - uses: actions/checkout@v4
+        with:
+          ref: refs/pull/${{ github.event.pull_request.number }}/merge
+          path: topic
+          set-safe-directory: false
+      - uses: ruby/setup-ruby@v1
+        working-directory: default
+        with:
+          ruby-version: '3.3'
+          bundler-cache: true
+      - run: bundle exec danger --dangerfile=../default/Dangerfile
+        working-directory: topic
+        env:
+          BUNDLE_GEMFILE: ../default/Gemfile
+          DANGER_DO_NOT_POST_INVALID_DANGERFILE_ERROR: ''
+          DAGNER_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

@@ -1,4 +1,4 @@
-name: Test
+name: test
 on: [push]
 jobs:
   test:

Dangerfile

@@ -3,8 +3,3 @@
 rubocop.lint inline_comment: true
 
 plugin_lint.lint_docs
-
-periphery.binary_path = 'bin/periphery'
-periphery.scan(project: 'spec/support/fixtures/test.xcodeproj', schemes: 'test', targets: 'test') do |violation|
-  !violation.message.include?('unused')
-end