Always pass the script string around by reference

src/Script.hpp

@@ -23,9 +23,9 @@ class Script {
     shared_ptr<ScriptType> _returnType;
 
     explicit Script();
-    void Parse(string script);
+    void Parse(const string& script);
 public:
-    static Script* Create(string script);
+    static Script* Create(const string& script);
     DiagnosticsHolder* Diagnostics;
 
     ~Script();