fix(draw): consistently use custom snapsvg

lib/draw/PathMap.js

@@ -1,10 +1,12 @@
 'use strict';
 
+var Snap = require('diagram-js/vendor/snapsvg');
+
 /**
  * Map containing SVG paths needed by BpmnRenderer.
  */
 
-function PathMap(Snap) {
+function PathMap() {
 
   /**
    * Contains a map of path elements
@@ -448,7 +450,4 @@ function PathMap(Snap) {
   };
 }
 
-
-PathMap.$inject = [ 'snap' ];
-
 module.exports = PathMap;