Add phpstan check

Author: kitloong

.github/workflows/phptest.yml

@@ -16,7 +16,8 @@ jobs:
  - name: Cancel Previous Runs
  uses: styfle/cancel-workflow-action@0.9.1
  with:
- access_token: ${{ github.token }} 
+ access_token: ${{ github.token }}
+
  - name: Checkout
  uses: actions/checkout@v2
 
@@ -38,7 +39,11 @@ jobs:
 
  - name: PHPLint
  run: |
- ./vendor/bin/phpcs --standard=phpcs.xml --extensions=php --ignore=tests/migrations config/ src/
+ ./vendor/bin/phpcs
+
+ - name: PHPStan
+ run: |
+ ./vendor/bin/phpstan analyse
 
  - name: Upload to codecov
  uses: codecov/codecov-action@v3