docs: update changelog

CHANGELOG.md

@@ -1,5 +1,29 @@
 # Change Log
 
+## [v2.0.0](https://github.com/adalinesimonian/jshiki/tree/v2.0.0) (2021-08-12)
+
+### BREAKING CHANGES
+
+- `parse()` now returns the expression function instead of an object
+- Polymer Expressions holdovers (filters, as/in expressions) removed
+- Errors thrown when parsing invalid expressions are now thrown when parsing instead of during evaluation
+
+### Additions
+
+- `evaluate()`, which executes an expression immediately, added to API
+
+### Fixes
+
+- Tests for the `<<` bitwise left shift and `>>` bitwise right shift operators fixed; prior, the tests mistakenly used `<` and `>` instead of `<<` and `>>`
+
+### Development changes
+
+- Rewritten in [TypeScript][typescript]
+- Switched to [jest][jest] for testing
+- Switched CI to [Github Actions][github-actions]
+
+[Full Changelog](https://github.com/adalinesimonian/jshiki/compare/v1.1.1...v2.0.0)
+
 ## [v1.1.1](https://github.com/adalinesimonian/jshiki/tree/v1.1.1) (2021-05-19)
 
 [Full Changelog](https://github.com/adalinesimonian/jshiki/compare/v1.1.0...v1.1.1)
@@ -25,3 +49,7 @@
 [Full Changelog](https://github.com/adalinesimonian/jshiki/compare/v0.0.1...v0.0.2)
 
 ## [v0.0.1](https://github.com/adalinesimonian/jshiki/tree/v0.0.1) (2015-09-07)
+
+[jest]: https://jestjs.io
+[typescript]: https://www.typescriptlang.org
+[github-actions]: https://github.com/features/actions