added empty module to string_score

string_score/string_score.d.ts

@@ -3,6 +3,11 @@
 // Definitions by: Marcin Porębski <https://github.com/marcinporebski/>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
+declare module "string_score"
+{
+    // nothing here as it's only extending the build in String class
+}
+
 interface String {
     score: (word: string, fuzzy?: number) => number;
 }