perf: tree-shake spinners

[github-actions[bot]]

📊 Package size report   -10.6%↓

File	Before (Size / Gzip)	After (Size / Gzip)
dist/index.js	306.9 kB / 97.5 kB	-10.8%↓273.9 kB / -6.81%↓90.9 kB
dist/index.mjs	306.7 kB / 97.5 kB	-10.8%↓273.6 kB / -6.85%↓90.8 kB
package.json	1.8 kB / 829 B	-2.36%↓1.7 kB / -1.69%↓815 B
Total (Includes all files)	628.1 kB / 200.7 kB	-10.6%↓561.9 kB / -6.64%↓187.4 kB
Tarball size	201.1 kB	-6.78%↓187.5 kB

Unchanged files

| File | Size (Size / Gzip) | | ------------------------------------------------------------------------------------ | ------------------: | | `dist/index.d.ts` | `2.8 kB` / `1.1 kB` | | [`LICENSE`](https://github.com/privatenumber/tasuku/blob/custom-spinner/LICENSE) | `1.1 kB` / `658 B` | | [`README.md`](https://github.com/privatenumber/tasuku/blob/custom-spinner/README.md) | `8.8 kB` / `3.1 kB` |

_{🤖 This report was automatically generated by pkg-size-action}

[privatenumber]

:tada: This PR is included in version 2.0.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: