Make BaseApi->checkAllowedScope into an object method

- It isn't called from static contexts anymore

src/Module/Api/Twitter/Blocks/Lists.php

@@ -33,7 +33,7 @@ class Lists extends ContactEndpoint
 {
 	protected function rawContent(array $request = [])
 	{
-		self::checkAllowedScope(self::SCOPE_READ);
+		$this->checkAllowedScope(self::SCOPE_READ);
 		$uid = BaseApi::getCurrentUserID();
 
 		// Expected value for user_id parameter: public/user contact id