* Upgrade Next.js from 9.1.2 to 9.5.3
* Inline the CSS for improved first paint performance
* Change ENV to NODE_ENV
Possibly the CSS was not minified due to this
* Remove render blocking stripe JS that seems unnecessary
* Use native lazy loading of images
- Truly a progressive enhancement, only affects browsers that support it
- Causes a warning: [Intervention] An <img> element was lazyloaded with loading=lazy, but had no dimensions specified. Specifying dimensions improves performance. See https://crbug.com/954323, which can not be easily fixed
* Render content first, hydrate after that
* Convert to using TypeScript
Next.js v.9 allows converting an existing project to TS by simply renaming the files as TS files
* Fix type errors: Type 'string' is not assignable to type 'number'.
* Add mention about missing typings for javascript-time-ago
* Add GA_INITIALIZED to window
* Fix type error in feed transformers
* Model MembershipInfoForm state and props with TS
* Silence the typescript warning in MembershipInfoForm
* Add threshold to Fader props
* Fix Warning: Each child in a list should have a unique "key" prop.
Sponsors don't have ids – name is probably unique and can be used as a key
* Allow key as prop for SponsorLink
* Add type of the props for SponsorLink
