Merge pull request #170 from underfin/fix-esm-build

fix: fix esm build

Author: lmiller1990

src/utils/compileSlots.ts

@@ -1,6 +1,7 @@
 import { compile } from '@vue/compiler-dom'
+import * as vue from 'vue'
 
-export function processSlot(template = '', Vue = require('vue')) {
+export function processSlot(template = '', Vue = vue) {
   const hasWrappingTemplate = template && template.startsWith('<template')
 
   // allow content without `template` tag, for easier testing