* Upgrade to TypeScript 4.8. Keep testing with 4.7 to ensure backwards compatibility.
* Update dev dependencies
* Update dependencies
* Tweak type definitions used in exports map for TS 4.8 compatibility. Duplicate and export shared types where appropriate, but don't export from the other export file since it seems to confuse things.
* Only test against TypeScript 4.7
* Move type definitions to entrypoints/
Only TS 4.7 will resolve them now, but it's cleaner.
* Use @sindresorhus/tsconfig
* Fix test TypeScript files, make compilable and lintable
* Use tsc directly, instead of tsd
* Add *.cts versions of type tests
* Reorganize type tests
* Use tsc directly, avoid npx, print actual version
Somehow `npx tsc` was pointing at an older version. Possibly the binstubs are corrupted in CI… somehow.
