Fetch song lyrics from several internet lyric sites.

Changes for 1.30 - 2024-01-25

• Added LyricFinder::ChartLyrics to fetch lyrics and album-covers from api.chartlyrics.com.
• Update default user-agent to Firefox 112.0.
• LyricFinder::_Class: Allow http (in addition to https) - needed by LyricFinder::ChartLyrics. Also pass the artist and song title parameters back to _fetch() - also needed by LyricFinder::ChartLyrics.