1. Use .lrc format lyrics as subtitles if available.
2. Remove the 3rd digit after dot in NetEase's time tag to fit LRC
format standard for time tag.
3. Update lyrics_expr to match empty string after time tag as a
valid lrc (music players uses this to hide previous item's text).
4. Add new regular expressions to match only text for the line with
multiple time tag for translation to avoid time tag is treated part of
lyrics.
This will return at most 2 lyrics. one for original text, the other
for the translated text if it exists.
Also add two extra tests to test:
1. multiple time tag in one line,
2. multiple time tag in one line with time need to be fixed to
hundredth of second rather
than millisecond.
