py-imageio: update to 2.36.1, add py313 subport

[erikbs]

Description

Update to 2.36.1 and add subport for Python 3.13, which is officially supported. This package still supports Python 3.9, so no need to pin that version to a specific package version.

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 10.9.5 13F1911 x86_64
Xcode 6.2 6C131e

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• checked your Portfile with port lint?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?

Tested by importing the module and reading an image.

[macportsbot]

Notifying maintainers:
@stromnov for port py-imageio.