update escope version for support String Template

lib/esshorten.js

@@ -1,4 +1,4 @@
-/*
+/*!
   Copyright (C) 2013 Yusuke Suzuki <[email protected]>
 
   Redistribution and use in source and binary forms, with or without
@@ -234,10 +234,10 @@
 
     function mangleLabels(tree) {
         var labelScope;
-
+        var FuncOrProgram = [Syntax.Program, Syntax.FunctionExpression, Syntax.FunctionDeclaration];
         estraverse.traverse(tree, {
             enter: function (node) {
-                if (escope.Scope.isVariableScopeRequired(node)) {
+                if (FuncOrProgram.indexOf(node.type) >= 0) {
                     labelScope = new LabelScope(labelScope);
                     return;
                 }
@@ -255,7 +255,7 @@
             },
             leave: function (node) {
                 labelScope.unregister(node);
-                if (escope.Scope.isVariableScopeRequired(node)) {
+                if (FuncOrProgram.indexOf(node.type) >= 0) {
                     labelScope = labelScope.close();
                 }
             }

package.json

@@ -21,8 +21,8 @@
     "url": "http://github.com/estools/esshorten.git"
   },
   "dependencies": {
+    "escope": "~3.3.0",
     "estraverse": "~4.1.1",
-    "escope": "~1.0.1",
     "esutils": "~2.0.2"
   },
   "devDependencies": {