chore(main): release 0.2.0

[a2a-bot]

🤖 I have created a release beep boop

0.2.0 (2025-11-12)

Features

• Add Lightning Network payment scheme for x402 (#23) (8076c9b)
• add mypy type checking (#50) (0ca2ed7)
• added publish pypi package workflow (#26) (ff6820a)
• Adding example demo showing how the Intent, Cart and Payment mandates… (#43) (46dd48b)
• Display currency name in payment request messages (#19) (a50b512)

Bug Fixes

• mypy type issues (#51) (9c7f356)
• Update config.py to fix X402_EXTENSION_URI (#21) (df2e010)

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This PR was generated with Release Please. See documentation.

[gemini-code-assist]

Summary of Changes

Hello @a2a-bot, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request is an automated release for version 0.2.0 of the project. It consolidates several new features, including enhanced payment scheme support and improved messaging, along with a crucial bug fix. The primary goal is to update the project's official version and provide clear documentation of the changes through a newly added changelog.

Highlights

• New Release: This pull request officially releases version 0.2.0 of the project, incorporating a set of new features and a bug fix.
• Features Introduced: Version 0.2.0 includes support for the Lightning Network payment scheme for x402, a new workflow for publishing PyPI packages, and the ability to display currency names in payment request messages.
• Bug Fix: A critical bug related to the X402_EXTENSION_URI in config.py has been addressed and fixed in this release.
• Changelog Added: A new CHANGELOG.md file has been added to the repository, documenting all the changes included in this 0.2.0 release.

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[gemini-code-assist]

Code Review

This pull request, generated by release-please, prepares for the 0.2.0 release. The primary change is the creation of CHANGELOG.md. The changelog accurately reflects the features and fixes included in this release. I've made a few minor suggestions to improve the formatting and consistency of the changelog for better readability. Otherwise, the changes look good.

[gemini-code-assist]

This extra blank line can be removed to make the changelog more compact.

[gemini-code-assist]

This extra blank line can be removed to make the changelog more compact.

[lingzhong]

@jorellis Given the timeline of the AP2 demo development and core libs clean ups, should we punt 0.2.0 until these changes are in?