Indenter

_Note: Not functionally different from v1.0.2._

- Reclassify v1.0.2 as v1.1.0 because it adds new functionality
- Update some documentation
- Update some internal tooling

- Add support for integer addition and subtraction against `Indenter`s:
python
ind = Indenter()
str(ind) ""
str(ind + 1) " "
str(ind + 1 - 1). ""

- No changes; release pipeline fixes only

- Initial release