- Update to v5.0.0
* Change to console markup syntax to not parse Python structures
as markup, i.e. `[1,2,3]` is treated as a literal, not a tag.
* Standard color numbers syntax has changed to `"color()"`
so that `[5]` (for example) is considered a literal.
* Markup escape method has changed from double brackets to
preceding with a backslash, so `foo[[]]` would be `foo\[bar]`
- From v4.2.2
* Added thread to automatically call update() in progress.track().
Replacing previous adaptive algorithm.
* Second attempt at working around https://bugs.python.org/issue37871