Check dependent PR

.github/workflows/dependent-issues.yml

@@ -0,0 +1,41 @@
+name: Dependent Issues
+
+on:
+  pull_request_target:
+    branches:
+      - release/4.0.0
+      - master
+    types:
+      - opened
+      - edited
+      - closed
+      - reopened
+      # Makes sure we always add status check for PRs. Useful only if
+      # this action is required to pass before merging. Otherwise, it
+      # can be removed.
+      - synchronize
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: z0al/dependent-issues@v1
+        env:
+          # (Required) The token to use to make API calls to GitHub.
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+        with:
+          # (Optional) The label to use to mark dependent issues
+          label: dependent
+
+          # (Optional) A comma-separated list of keywords. Default
+          # "depends on, blocked by"
+          keywords: depends on, blocked by
+
+          # (Optional) A custom comment body. It supports `{{ dependencies }}` token.
+          comment: >
+            This PR/issue depends on:
+
+            {{ dependencies }}
+
+            PRs are only allowed to get merged after its dependecies.