The following PRs require a new .mpy file format version so it would be good to merge them around the same time so the .mpy version only needs to be updated once:

• py/persistentcode: Only store a single instance of source_file in mpy. py/persistentcode: Only store a single instance of source_file in mpy. #4472; superseded by 5996eeb
• py: Define a set of static qstrs to reduce size of mpy files. py: Define a set of static qstrs to reduce size of mpy files. #4473; see 4f0931b
• py: Fix unwinding of try-finally with break in finally clause py: Fix unwinding of try-finally with break in finally clause #4504; see e1fb03f
• Add support to save native, viper and inline-asm code to .mpy files Add support to save native, viper and inline-asm code to .mpy files #4535; see 1396a02