fix(src/core/vdom/patch.js): fix the bug 'root level <script> tags wi…

…ll be executed' in issue#11483

Root level <script> tags should not be executed, for consistent behavior. So I remove the code in
<script> tag when the <script> tag is the root element of the template.

fix vuejs#11483

src/core/vdom/patch.js

@@ -188,7 +188,10 @@ export function createPatchFunction (backend) {
           insert(parentElm, vnode.elm, refElm)
         }
       } else {
-        createChildren(vnode, children, insertedVnodeQueue)
+        // fix:11483, remove the code in <script> tag when the <script> tag is the root element of the template.
+        if (vnode.tag !== 'script') {
+          createChildren(vnode, children, insertedVnodeQueue)
+        }
         if (isDef(data)) {
           invokeCreateHooks(vnode, insertedVnodeQueue)
         }