Add .gitignore

Author: tvdijen

.gitignore

@@ -0,0 +1,11 @@
+.phpunit.result.cache
+/.phpunit.cache/
+/build/
+/super-linter-output/
+/vendor/
+phpunit.xml.bak
+composer.phar
+composer.lock
+
+# Commit your application's lock file https://getcomposer.org/doc/01-basic-usage.md#commit-your-composer-lock-file-to-version-control
+# You may choose to ignore a library lock file http://getcomposer.org/doc/02-libraries.md#lock-file