Fix iterateProperties to support arrow functions

[maddocnc]

current iterateProperties doesn't support arrow function properties. However it supports functions and iterate their returned objects.

So we can't treat properties from arrow functions same way:

default way works:

data: function () {
  return {
   property: 'value'
  }
},

But following examples won't work:

data: () => {
  return {
   property: 'value'
  }
},

or like this:

data: () => ({
  property: 'value'
}),

Pull request adds support for ArrowFunctionExpression in iterateProperties.

[ota-meshi]

Thank you for this PR!

Could you add test cases to the following rules.

• no-dupe-keys
• no-reserved-keys
• no-template-shadow

[maddocnc]

@ota-meshi , added same cases but with 2 types of arrow functions:
() => {return...} and ()=>({})
where was tests with function () {}

[ota-meshi]

LGTM! Thank you!

[maddocnc]

Thank you, for approving.

So what's next? We need some other review?
When it could be in npm approximately?

We are going to release project soon where we need this changes, we could use fork there, but this changes seems quite useful for everyone, that's why we made PR.

[ota-meshi]

Hi @frenchrabbit.
I don't know when the release will be, but I will probably release this change with a beta release (7.x-beta) that supports Vue.js 3.
I would normally release this change in a minor release, but I don't have that time.

[maddocnc]

Ok, thank you. Looking forward to see it in release.