Create README.md

Author: Dave13h

README.md

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+# PHP Censor - Cron Linting Plugin
+
+Lint cron files during a PHPCI/Censor build.
+
+# Installation
+
+```composer require dave13h/php-censor-cronlint-plugin```
+
+# Usage
+```yml
+test:
+  cron_lint:
+      files: ['config/cron']
+```