Attempt to start WP tests

Author: pdobrescu

.github/workflows/spio.yml

@@ -33,6 +33,7 @@ jobs:
       DB_USER: root
       DB_PASS: password
       DB_HOST: 127.0.0.1
+      WP_RUN_CORE_TESTS: 1
 
     steps:
       - name: Checkout code

phpunit.xml.dist

@@ -10,7 +10,6 @@
 	<testsuites>
 		<testsuite name="testing">
 			<directory prefix="test-" suffix=".php">./tests/</directory>
-			<exclude>./tests/test-sample.php</exclude>
 		</testsuite>
 	</testsuites>
 </phpunit>