added an initial PHP linting github action

.github/workflows/php.yml

@@ -0,0 +1,38 @@
+name: PHP Linting
+
+on: [push]
+
+jobs:
+  lint:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [7.3, 7.4]
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: PHP Version
+      run: php --version
+
+    - name: Lint PHP Files
+      run: find . -name "*.php" -print0 | xargs -0 -n1 php -l
+
+    - name: Lint PHP Files ( 8 threads )
+      run: find . -name "*.php" -print0 | xargs -0 -n1 -P8 php -l
+
+#    - name: Cache composer dependencies
+#      uses: actions/cache@v1
+#      with:
+#        path: vendor
+#        key: composer-${{ hashFiles('composer.lock') }}
+
+
+    - name: Validate composer.json and composer.lock
+      run: ls composer.json > /dev/null && composer validate
+
+    - name: Composer Install
+      run: ls composer.json > /dev/null && composer install
+
+    - name: Run PHPUnit tests
+      run: ls vendor/bin/phpunit > /dev/null && ./vendor/bin/phpunit

composer.json

@@ -3,7 +3,6 @@
     "description": "Takes stock of a local install and generates a composer.json",
     "license": "GPL-2.0+",
     "type": "wordpress-plugin",
-    "version": "dev-master",
     "authors": [
         {
             "name": "Tom J Nowell",