Bump version to 2.0.0

[tonyzorin]

Breaking change: init.py renamed to ksuid.py (import path unchanged). New features: lowercase base36, secure tokens, slots, Python 3.9+. See CHANGELOG.md for full details.

https://claude.ai/code/session_01PVPVUNWhpxVa3xbDDBnwp2

Summary by CodeRabbit

Release Notes: Version 2.0.0

• New Features

  • Added lowercase base36 and base36/base62 helper functions
  • Introduced module-level base36 conversion capabilities
  • Enhanced concurrency support

• Bug Fixes

  • Fixed validation, encoding/decoding edge cases, and equality semantics
  • Improved parse and round-trip reliability
  • Enhanced epoch/date consistency and Unicode handling

• Changes

  • BREAKING: Module restructuring
  • Python minimum version downgrade
  • Performance and lookup optimizations
  • Improved security for token generation and timestamp handling

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The PR updates the module version from 1.0.0 to 2.0.0 and adds a comprehensive changelog documenting major additions, fixes, and breaking changes introduced in the 2.0.0 release, while reorganizing previous version entries.

Changes

Cohort / File(s)	Summary
Version Bump ksuid.py	Updates __version__ constant from "1.0.0" to "2.0.0".
Changelog Documentation CHANGELOG.md	Introduces new 2.0.0 release section documenting Added items (lowercase base36, base36/base62 helpers, concurrency tests, CI matrix, edge-case tests), Fixed items (validation, encoding/decoding, equality semantics, epoch/date consistency, Unicode handling), Changes (BREAKING rename, Python version downgrade, performance optimizations, code formatting), and Security notes. Reorganizes 1.0.0 entries for clarity.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A hop, a skip, a version's cheer,
Two-point-oh arrives with fanfare here!
KSUID bounds forth with fixes galore,
Base36 magic opens new doors,
Release the rabbits—the future is near! 🎉

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch claude/security-audit-Vwtzv

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