Beautiful Soup 4.13.1

[leonardr]

I've released Beautiful Soup 4.13.1 after waking up (as I thought might happen) to a number of filed bugs. Here's the changelog:

* Updated pyproject.toml to require Python 3.7 or above. [bug=2097263]
* Pinned the typing-extensions dependency to a minimum version of 4.0.0.
  [bug=2097262]
* Restored the English documentation to the source distribution.
  [bug=2097237]
* Fixed a regression where HTMLFormatter and XMLFormatter were not
  propagating the indent parameter to the superconstructor. [bug=2097272]

Given the number of changes in 4.13.0 there will probably be another bugfix release, possibly even later today. But I wanted to put out a release ASAP that fixed the dependency problems.