fix(types): fix ThisType of component options with no props option

[wadetandy]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• It's submitted to the dev branch for v2.x (or to a previous version branch), not the master branch
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• All tests are passing: https://github.com/vuejs/vue/blob/dev/.github/CONTRIBUTING.md#development-setup
• New/updated tests are included

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

It seems that @ktsn and I had the same problem at the same time, as I separately found and fixed the problem identified in #7131 with this PR. I noticed @HerringtonDarkholme had open questions about the never type. My solution to the problem was a separate overload for Vue.extend and Vue.component that involves a third typed props type. I'm not expert enough on typescript to know which of these is a better solution, but I figured I'd open the duplicate-ish PR since I had a different approach in case you prefer it.

[HerringtonDarkholme]

Thanks for your contribution!

After investigation, I think never type shouldn't be the issue. And @ktsn 's solution is arguably more succinct. So I hope you wouldn't mind if this pull request is going to be closed.

Thank you any way for this pull request!

[yyx990803]

ref: #7135

Thanks for the PR though!

[wadetandy]

@HerringtonDarkholme as long as we have a fix in place I'm happy 😄 . Thanks for all the hard work.