Increased SKIN_SHARE_SOFT_LIMIT to 301, so

scratch-vm will not throw a EventEmitter memory leak warning.

Reason:
the max number of clones is 300, plus 1 for itself.
Then the shared skin will exceed it's limit.
Changing the number from 300 to 301 fixes this issue.

src/RenderConstants.js

@@ -16,7 +16,7 @@ module.exports = {
      * Going above this may cause middleware warnings or a performance penalty but should otherwise behave correctly.
      * @const {int}
      */
-    SKIN_SHARE_SOFT_LIMIT: 300,
+    SKIN_SHARE_SOFT_LIMIT: 301,
 
     /**
      * @enum {string}