Add missing files to distribution

• add URLs to pyproject.toml
• include ./examples in source distributions

Extended linting

• use more ruff rules
• lint unit tests
• lint examples
• lint the generated parser
• make sure generated parsers and models pass ruff

bug fix and optimizations

• [exceptions] generators in exceptions break multiprocessing
• [buffering] optimize use of regular expressions

Rework the asjson() protocol for JSON views of models

This release adds fixes, enhancements, optimizations, and documentation to the asjson() protocol that is used to view ASTs and models.

The bump in the minor version number because the changes to asjson() will likely break code that relies on the __json__() protocol and thus create a backwards incompatibility.

Resolve regressions with parser code generation

• [codegen] pass whitespace setting to parser
  | * [codegen] restore default Buffer class

Fix build and distribution

Fix errors in the move to pyproject.toml

Features and regression fixes

• validate with Python 3.12 (#313)
• drop support for Python 3.10 (#313)
• move build configuration to pyproject.toml (#316 #317)
• evaluate constant to a Python literal when possible (#304 #320)
• fix comments_re and eol_comments_re so they effectively can be None (#307 #312 #314)
• skip over whitespace and comments before memoizing (#305 #306 #309 #318)
• verify that () parses to None or is ignored (#308)

Synchronize with v5.7.4

This release makes TatSu compatible with Python >= 3.8, but still states that the compatible version is Python >= 3.10.

Restore compatibility with Python >= 3.8

v5.7.4

[release] bum up version number for development

Fixes to walkers

• Fix walker cache logic in NodeWalker (@by-Exist)