fix(deps): update dependency audioplayers to ^0.18.0

[timoknapp]

This PR contains the following updates:

Package	Type	Update	Change
audioplayers	dependencies	minor	^0.17.0 -> ^0.18.0

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Release Notes

luanpotter/audioplayers

### [`v0.18.0`](https://togithub.com/luanpotter/audioplayers/blob/master/CHANGELOG.md#​0180) - Stable null-safety release - Removed all the `@deprecated` code blocks

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