feat: support pull_request_target events (#52)

README.md

@@ -91,7 +91,7 @@ jobs:
         uses: opensource-nepal/commitlint@v1
 ```
 
-> **_NOTE:_** commitlint GitHub Actions will only be triggered by "push" or "pull_request" events.
+> **_NOTE:_** commitlint GitHub Actions will only be triggered by "push", "pull_request", or "pull_request_target" events. The difference between "pull_request" and "pull_request_target" is that "pull_request" is more secure for public repos while "pull_request_target" is necessary for private repos.
 
 #### GitHub Action Inputs
 

github_actions/run.py

@@ -13,6 +13,7 @@
 # Events
 EVENT_PUSH = "push"
 EVENT_PULL_REQUEST = "pull_request"
+EVENT_PULL_REQUEST_TARGET = "pull_request_target"
 
 # Inputs
 INPUT_FAIL_ON_ERROR = "INPUT_FAIL_ON_ERROR"
@@ -174,7 +175,7 @@ def main() -> None:
 
     if event.event_name == EVENT_PUSH:
         _handle_push_event(event)
-    elif event.event_name == EVENT_PULL_REQUEST:
+    elif event.event_name in {EVENT_PULL_REQUEST, EVENT_PULL_REQUEST_TARGET}:
         _handle_pr_event(event)
     elif event.event_name is None:
         sys.stdout.write("No any events, skipping\n")