feat: support pull_request_target events

`pull_request` events don't have the necessary privileges to access
private repos. Adding support for the `pull_request_target` event will
allow private repos to also use commit lint.

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"
@@ -176,6 +177,8 @@ def main() -> None:
         _handle_push_event(event)
     elif event.event_name == EVENT_PULL_REQUEST:
         _handle_pr_event(event)
+    elif event.event_name == EVENT_PULL_REQUEST_TARGET:
+        _handle_pr_event(event)
     elif event.event_name is None:
         sys.stdout.write("No any events, skipping\n")
     else: