Merge pull request v923z#298 from v923z/std-fix

Std fix

Merge pull request v923z#299 from v923z/legacy-std-fix

fixed the calculation of the standard deviation on iterables

Merge pull request v923z#291 from v923z/openmv

adds option to override pre-processor constants

Merge branch 'numpy-scipy'

Moving to complete numpy compatibility

Merge pull request v923z#288 from jepler/fix-stubs

frombuffer: Add type declarations to stubs

added frombuffer stub

Merge pull request v923z#283 from mdaeron/master

Should close v923z#282

Merge pull request v923z#194 from v923z/diag

added diagonal and updated extract_pyi from circuitpython

Merge pull request v923z#186 from jepler/ci-circuitpython

Build circuitpython-ulab as part of CI

Merge pull request v923z#151 from v923z/docs

fixed indentation error in approx.c