fix: Reduce selected menu option styles specificity

[csandman]

This PR fixes the issue described in #308. It removes the _selected check for the menu option style overrides because it was too specific. Sorry for the delay on this one, I completely forgot about this being an issue. The fix basically just reverts the change that was made in v4.7.6: v4.7.5...v4.7.6#diff-282462b390

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One also small change, is that I generalized the dependency version of react-select to be 5.8.x.

[github-actions]

📊 Package size report   0.01%↑

File	Before	After
dist/index.js	16.5 kB	-0.04%↓16.5 kB
dist/index.js.map	74.0 kB	0.02%↑74.0 kB
dist/index.mjs	15.1 kB	-0.05%↓15.1 kB
dist/index.mjs.map	73.9 kB	0.02%↑74.0 kB
Total (Includes all files)	272.2 kB	0.01%↑272.2 kB
Tarball size	60.9 kB	-0.03%↓60.9 kB

Unchanged files

File	Size
dist/index.d.mts	21.1 kB
dist/index.d.ts	21.1 kB
LICENSE.md	1.1 kB
package.json	3.0 kB
README.md	46.3 kB

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