actions: Fix

.github/workflows/pr.yml

@@ -1,11 +1,19 @@
-name: OpenOSRS - CI (push)
+name: OpenOSRS - CI (PR)
 
-on:
-  push:
-    branches:
-      - master
+on: pull_request
 
 jobs:
+  pr-lint:
+    name: PR title
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: PR title lint
+        if: github.event_name == 'pull_request'
+        uses: seferov/pr-lint-action@master
+        with:
+          title-regex: '^([\w-/]+): \w+'
+
   build:
     runs-on: ubuntu-latest
     name: Build
@@ -55,4 +63,27 @@ jobs:
       - name: Assembling
         run: ./gradlew assemble --console=plain
       - name: Checking code conventions
-        run: ./gradlew checkstyleMain --console=plain
+        run: ./gradlew checkstyleMain --console=plain
+
+  approve:
+    name: Approve
+    needs: [build, test, checkstyle]
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Approve pull request
+        if: github.event_name == 'pull_request' && github.actor == 'OpenOSRS'
+        uses: hmarr/auto-approve-action@v2.0.0
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+
+  merge:
+    name: Merge
+    needs: approve
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: maxkomarychev/merge-pal-action@v0.1.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}