stubgen cannot create `.pyi` stubs for umqtt.robust

[Josverl]

Describe the bug A clear and concise description of what the bug is.

stubgen cannot create .pyi stubs for umqtt.robust

robust.py contains from . import simple but there is no init.py, therefore relative imports are not possible

To Reproduce in stubber Steps to reproduce the behavior:

• python3 src/get_all_frozen.py -stubs all-stubs --mpy

logs

....
Calling stubgen on all-stubs/micropython-latest-frozen/esp8266/GENERIC/umqtt/robust.py
Processing 1 files...
Critical error during semantic analysis: all-stubs/micropython-latest-frozen/esp8266/GENERIC/umqtt/robust.py:2: error: No parent module -- cannot perform relative import

Screenshots If applicable, add screenshots to help explain your problem.

Stubber information

• Version
• Normal or Minified version
• run directly or though Micropy-cli

Firmware Information

• Family: [e.g. micropython, pycopy , M5Stack ...]
• Version [e.g. 1.17-Latest]
• specific additional modules ( if any)

Hardware information

• Make & version
• CPU
• Link to HW spec ( if possible)

VS Code Extension Information (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[Josverl]

fixed by workaround in 793bbb368f2add1d264dd810bdb24b9bc32ec574