0.6.5: Updated late February 2025 for the "2nd Docker Apocalypse"

Docker, Inc has announced a 2nd apocalypse for 1st of March'25 (it has already been pushed back to April).
This has caused a new surge of interest in this project; in response I've updated all dependencies to the latest versions,
added a Test matrix, merged some pull requests (including DISABLE_IPV6=true, which was a long-standing request), and updated the documentation.

Many thanks to all the contributors over the years; I've no intention of abandoning this project -- please keep sending and updating your PRs.

What's Changed

• Instructions for Windows Docker Desktop by @akosdudas in #95
• doc: add kind cluster usage by @leorolland in #99
• docs: k3d integration by @saada in #112
• add option to disable request buffering. by @saces in #125
• Allow proxying to any destination port number (not 443 only) by @noseka1 in #137
• Mitmproxy won't start due to soft_unicode removed from markupsafe by @noseka1 in #138
• Fix links in README.md by @lucapette in #139
• hide progress bar of curl by @vangie in #135

New Contributors

• @akosdudas made their first contribution in #95
• @leorolland made their first contribution in #99
• @saada made their first contribution in #112
• @saces made their first contribution in #125
• @noseka1 made their first contribution in #137
• @lucapette made their first contribution in #139
• @vangie made their first contribution in #135

Full Changelog: 0.6.4...0.6.5