v1.35.3

This release significantly improves performance, especially for large files and large projects.

Formatting https://github.com/openedx/edx-platform took 87 seconds in the previous version, now it takes only 4 seconds (>2000% speedup)! Tested on a 32-core computer.

• Performance improved by caching some functions. Thanks to @JCWasmx86!
• Removed the limitation on the number of workers introduced in v1.35.0.
• Drop Python 3.8 support.