Github workflows: run checks on pull requests from forks (#47)

Signed-off-by: Jesse Whitehouse <[email protected]>

Author: Jesse

.github/workflows/code-quality-checks.yml

@@ -1,5 +1,5 @@
 name: Code Quality Checks
-on: [push]
+on: [pull_request, push]
 jobs:
   run-unit-tests:
     runs-on: ubuntu-latest