Drop Python 3.7

[chrysle]

• I have added an entry to docs/changelog.md

Summary of changes

Dropped support for Python 3.7 which is EOL on June 26, 2023.

Closes #1040

Test plan

Tested by running

# command(s) to exercise these changes

[DimitriPapadopoulos]

I would recommend changing this too:

pipx/src/pipx/__init__.py

Lines 3 to 8 in 238ae43

	if sys.version_info < (3, 6, 0):
	sys.exit(
	"Python 3.6 or later is required. "
	"See https://github.com/pypa/pipx "
	"for installation instructions."
	)

[chrysle]

I would recommend changing this too

Thanks, but I already did that.

[dukecat0]

We may also need to remove this:

pipx/pyproject.toml

Line 27 in b489691

"importlib-metadata>=3.3.0; python_version < '3.8'",

[dukecat0]

@chrysle I think it's time to merge this. Could you apply the above comment and resolve the conflict?

[chrysle]

@chrysle I think it's time to merge this. Could you apply the above comment and resolve the conflict?

Sure, done!