Replace use of Parser::$mStripState, deprecated in 1.35

The replacement, Parser::getStripState(), was added to MediaWiki in
1.34.  But in fact, $parser->insertStripItem() hasn't required a
second parameter since MW 1.12.0 (commit b6dba5bcfd3).  Bumped
minumum required MediaWiki version to 1.12.0.

Bug: T275160
Change-Id: Ia04f1aac1d8ae4ea16c98cfbbe72195fffe653b6

SemanticRatingHtmlRenderer.php

@@ -84,7 +84,7 @@ private function render( $parser, $params ) {
 
 	public function renderInline( $parser, $params ) {
 		$output = $this->render( $parser, $params );
-		return array( $parser->insertStripItem( $output, $parser->mStripState ),
+		return array( $parser->insertStripItem( $output ),
 			'noparse' => false, 'isHTML' => true );
 	}
 

extension.json

@@ -9,6 +9,9 @@
 	"descriptionmsg": "semanticrating-desc",
 	"license-name": "MIT",
 	"type": "semantic",
+	"requires": {
+		"MediaWiki": ">= 1.12.0"
+	},
 	"MessagesDirs": {
 		"SemanticRating": [
 			"i18n"