add the deprecated mw.RegExp

Co-authored-by: 安忆 <[email protected]>

mw/RegExp.d.ts

@@ -0,0 +1,26 @@
+declare global {
+    namespace mw {
+        /**
+         * @class mw.RegExp
+         * @see https://doc.wikimedia.org/mediawiki-core/REL1_29/js/source/mediawiki.RegExp.html
+         */
+        namespace RegExp {
+            /**
+             * Escape string for safe inclusion in regular expression
+             *
+             * The following characters are escaped:
+             *
+             *     \ { } ( ) | . ? * + - ^ $ [ ]
+             *
+             * @deprecated
+             * @since 1.26; deprecated since 1.34
+             * @param {string} str String to escape
+             * @return {string} Escaped string
+             * @see https://doc.wikimedia.org/mediawiki-core/REL1_29/js/source/mediawiki.RegExp.html#mw-RegExp-static-method-escape
+             */
+            function escape(str: string): string;
+        }
+    }
+}
+
+export {};

mw/index.d.ts

@@ -12,6 +12,7 @@ import "./log";
 import "./Map";
 import "./message";
 import "./notification";
+import "./RegExp";
 import "./Rest";
 import "./storage";
 import "./template";