• Update to version 1.4

Major changes since 1.3.1:

• new builtins, ujson, uheapq, ubinascii modules
• new memoryview and compile builtins
• improvements for eval and exec
• array slice assignment support
• basix regex support
• x86 support for the native emitter
• many other fixes and improvements

Changelogs: https://github.com/micropython/micropython/release