Create PHPLint config for build actions

Author: jasonmccreary

.github/workflows/php.yml

@@ -10,6 +10,8 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
+    - uses: michaelw90/PHP-Lint@master
+
     - name: Validate composer.json and composer.lock
       run: composer validate
 

.phplint.yml

@@ -0,0 +1,10 @@
+path:
+  - src
+  - tests
+jobs: 10
+no-cache: true
+exclude:
+  - fixtures
+extensions:
+  - php
+