In the contributing doc, it mentions "Examples should be TypeScript first, if possible" so I thought about converting some examples to be typescript along with updating a couple in my free time. Let me know if that would be an issue.
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [X] Make sure the linting passes by running `yarn lint`
This issue is related to #12964
**I changed the following examples:**
`with-zeit-fetch`
`with-why-did-you-render`
`with-styletron`
`custom-server-fastify`
`custom-server-express`
`with-why-did-you-render`
`custom-server-hapi`
`custom-server-koa`
`custom-server-polka`
`custom-server-typescript`
`progressive-render`
`ssr-caching`
`svg-components`
`using-preact`
`with-ant-design`
