:octocat: fix PHPCS config, add Slevomat rules

examples/svgRandomColoredDots.php

@@ -26,9 +26,6 @@ require_once __DIR__.'/../vendor/autoload.php';
 // the extended SVG output module
 class RandomDotsSVGOutput extends QRMarkupSVG{
 
-	/**
-	 * @inheritDoc
-	 */
 	protected function path(string $path, int $M_TYPE):string{
 		// omit the "fill" and "opacity" attributes on the path element
 		return sprintf('<path class="%s" d="%s"/>', $this->getCssClass($M_TYPE), $path);
@@ -160,7 +157,7 @@ $out = (new QRCode($options))->render('https://www.youtube.com/watch?v=dQw4w9WgX
 
 
 // dump the output
-if(php_sapi_name() !== 'cli'){
+if(PHP_SAPI !== 'cli'){
 	header('content-type: image/svg+xml');
 }