The main features for this release:
* **Grammar caching**: It's now possible to cache the results of the LALR grammar analysis, for x2 to x3 faster loading. Use `Lark(..., cache=True)` or specify a file name. See here: https://lark-parser.readthedocs.io/en/latest/classes/
* **Grammar templates**: Added support for grammar "functions" that expand in preprocessing. No docs yet, but see here for examples:
https://github.com/lark-parser/lark/blob/master/tests/test_parser.py#L845
* **Lark online IDE**: Technically not a feature, but it's possible to run Lark in the browser. Now we also have a simple IDE on github pages: https://lark-parser.github.io/lark/ide/app.html
* Other changes:
* Improved performance for large grammars
* More debug prints when in debug mode
* Better support for PyInstaller
* Lots of bugfixes: mypy stubs, v_args, docs, and more.