Prefer using React memoization instead of mem when using inside React.

For republishing on the package repository.

`typescript-memoize` is not used, therefore we can remove it.

For republishing in the package repository.

Add memoization to expensive pure functions because the library involves a lot of computation under the hood.

Declare styled-components as dependency.

Bump version.

Use custom styled keys and add pressed keys for styled key set.

Add files generated from tsdx.