message: fix edge test case
diff: import { parse } from 'compiler/parser/index'
  import { extend } from 'shared/util'
  import { baseOptions } from 'web/compiler/index'
  -import { isIE } from 'core/util/env'
  +import { isIE, isEdge } from 'core/util/env'
  describe('parser', () => {
  it('simple element', () => {
  @@ -436,7 +436,7 @@ describe('parser', () => {
  expect('Interpolation inside attributes has been removed').toHaveBeenWarned()
  })
  - if (!isIE) {
  + if (!isIE && !isEdge) {
  it('duplicate attribute', () => {
  parse('<p class="class1" class="class1">hello world</p>', baseOptions)
  expect('duplicate attribute').toHaveBeenWarned()
  