Bump version to 1.9.5 for release

Use fork of PGPy (#23)

Alas PGPy has not been updated in 2 years, and cannot be
installed on python 3.13 as a result.

This change inserts a hopefully temporary fork of PGPy which
addresses both of those issues.

Co-authored-by: Nathan J. Mehl <[email protected]>

Merge pull request #19 from memory/bump-version

bump version to 1.9.3 for release

bump version in pyproject.toml to 1.9.2

Version 1.9.1

- Remove an extraneous print() statement.
- No need to import print_statement from __future__ -- we dropped
  py2 support ages ago so the future is now.

Merge pull request #11 from memory/bump-pgpy

Bump pgpy and other dependencies

Merge pull request #9 from memory/update-cryptography

3.8.0: pin back pycrypto, drop py3.6 support

Merge pull request #7 from memory/add-zstandard

Add support for zstandard control archives

hopefully fix testpypi publish step

Merge pull request #4 from memory/fix-tilde-compare

Fix tilde compare