docs: add badges

Author: Greg Bowler

README.md

@@ -8,19 +8,19 @@ This repository provides the concepts of a `Loop`, different `Timer` implementat
 ***
 
 <a href="https://github.com/PhpGt/Async/actions" target="_blank">
-	<img src="https://badge.status.php.gt/async-build" alt="PHP.Gt/Async build status" />
+	<img src="https://badge.status.php.gt/async-build.svg" alt="PHP.Gt/Async build status" />
 </a>
 <a href="https://app.codacy.com/gh/PhpGt/Async" target="_blank">
-	<img src="https://badge.status.php.gt/async-quality" alt="PHP.Gt/Async code quality" />
+	<img src="https://badge.status.php.gt/async-quality.svg" alt="PHP.Gt/Async code quality" />
 </a>
 <a href="https://app.codacy.com/gh/PhpGt/Async" target="_blank">
-	<img src="https://badge.status.php.gt/async-coverage" alt="PHP.Gt/Async code coverage" />
+	<img src="https://badge.status.php.gt/async-coverage.svg" alt="PHP.Gt/Async code coverage" />
 </a>
 <a href="https://packagist.PhpGt/packages/PhpGt/Async" target="_blank">
-	<img src="https://badge.status.php.gt/async-version" alt="PHP.Gt/Async latest release" />
+	<img src="https://badge.status.php.gt/async-version.svg" alt="PHP.Gt/Async latest release" />
 </a>
 <a href="http://www.php.gt/Async" target="_blank">
-	<img src="https://badge.status.php.gt/async-docs" alt="PHP.Gt/Async documentation" />
+	<img src="https://badge.status.php.gt/async-docs.svg" alt="PHP.Gt/Async documentation" />
 </a>
 
 Example usage