Fixed transform moving around the mask as well

plugins/moveElemsAttrsToGroup.js

@@ -39,7 +39,7 @@ exports.fn = function(item) {
 
         var intersection = {},
             hasTransform = false,
-            hasClip = item.hasAttr('clip-path'),
+            hasClip = item.hasAttr('clip-path') || item.hasAttr('mask'),
             intersected = item.content.every(function(inner) {
                 if (inner.isElem() && inner.hasAttr()) {
                     if (!Object.keys(intersection).length) {

test/plugins/moveElemsAttrsToGroup.04.svg

@@ -1,4 +1,7 @@
 <svg xmlns="http://www.w3.org/2000/svg">
+    <mask id="mask">
+        <path/>
+    </mask>
     <g transform="rotate(45)">
         <g transform="scale(2)" fill="red">
             <path d="..."/>
@@ -9,11 +12,18 @@
         <g transform="translate(10 10)"/>
         <g transform="translate(10 10)"/>
     </g>
+    <g mask="url(#mask)">
+        <g transform="translate(10 10)"/>
+        <g transform="translate(10 10)"/>
+    </g>
 </svg>
 
 @@@
 
 <svg xmlns="http://www.w3.org/2000/svg">
+    <mask id="mask">
+        <path/>
+    </mask>
     <g transform="rotate(45) scale(2)" fill="red">
         <g>
             <path d="..."/>
@@ -24,4 +34,8 @@
         <g transform="translate(10 10)"/>
         <g transform="translate(10 10)"/>
     </g>
+    <g mask="url(#mask)">
+        <g transform="translate(10 10)"/>
+        <g transform="translate(10 10)"/>
+    </g>
 </svg>