Small fixes

Author: kirillmurashov

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-drag-resize",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "description": "Vue Component for resize and drag elements",
   "author": "Kirill Murashov <me@kirillmurashov.com>",
   "main": "dist/index.js",

src/components/vue-drag-resize.js

@@ -251,7 +251,7 @@ export default {
                 this.active = true;
             }
 
-            if (ev.button !== 0) {
+            if (ev.button && ev.button !== 0) {
                 return
             }