fix: ShapeFlags is undefined

see: evanw/esbuild#1253

src/utils/getRootNodes.ts

@@ -1,6 +1,6 @@
-import { ShapeFlags } from '@vue/shared'
 import { isNotNullOrUndefined } from '../utils'
 import { VNode, VNodeArrayChildren } from 'vue'
+import { ShapeFlags } from './vueShared'
 
 export function getRootNodes(vnode: VNode): Node[] {
   if (vnode.shapeFlag & ShapeFlags.ELEMENT) {

src/utils/vueShared.ts

@@ -19,3 +19,17 @@ const hyphenateRE = /\B([A-Z])/g
 export const hyphenate = cacheStringFunction((str: string): string => {
   return str.replace(hyphenateRE, '-$1').toLowerCase()
 })
+
+export const enum ShapeFlags {
+  ELEMENT = 1,
+  FUNCTIONAL_COMPONENT = 2,
+  STATEFUL_COMPONENT = 4,
+  TEXT_CHILDREN = 8,
+  ARRAY_CHILDREN = 16,
+  SLOTS_CHILDREN = 32,
+  TELEPORT = 64,
+  SUSPENSE = 128,
+  COMPONENT_SHOULD_KEEP_ALIVE = 256,
+  COMPONENT_KEPT_ALIVE = 512,
+  COMPONENT = 6
+}

src/vueWrapper.ts

@@ -4,7 +4,6 @@ import {
   ComponentCustomProperties,
   ComponentPublicInstance
 } from 'vue'
-import { ShapeFlags } from '@vue/shared'
 // @ts-ignore todo - No DefinitelyTyped package exists for this
 import pretty from 'pretty'
 
@@ -22,6 +21,7 @@ import {
   WrapperType
 } from './wrapperFactory'
 import { VNode } from '@vue/runtime-core'
+import { ShapeFlags } from './utils/vueShared'
 
 export class VueWrapper<
   T extends Omit<