v0.18.0: New devices and platforms

FreeBuds Pro 5, FreeClip compactibility, initial macOS build ability (no release binaries
currently), low battery pop-up.

• [Platform] Initial macOS compatibility (thx @IAL32)
• [Device compatibility] HUAWEI FreeBuds Pro 5 (thx @JehuAlv)
• [Device compatibility] HUAWEI FreeClip / FreeClip 2 (thx @hereshui3)
• [Feature] Low battery / device connection popup (thx @Ast1va)