Cannot import osdp library from python3.9

[qdx]

Describe the bug After successfully building and installing the python library, error was encountered when trying to import the osdp library.

Expected behavior The osdp library should be imported without error.

Observed behavior When importing the osdp library via import osdp, below error is encountered:

➜  build git:(15) ✗ python3.9
Python 3.9.5 (default, May  4 2021, 03:36:27)
[Clang 12.0.0 (clang-1200.0.32.29)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import osdp
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/Users/dexinqi/Library/Python/3.9/lib/python/site-packages/osdp-1.5.0-py3.9-macosx-11-x86_64.egg/osdp.cpython-39-darwin.so, 2): Symbol not found: _hash32_djb2
  Referenced from: /Users/dexinqi/Library/Python/3.9/lib/python/site-packages/osdp-1.5.0-py3.9-macosx-11-x86_64.egg/osdp.cpython-39-darwin.so
  Expected in: flat namespace
 in /Users/dexinqi/Library/Python/3.9/lib/python/site-packages/osdp-1.5.0-py3.9-macosx-11-x86_64.egg/osdp.cpython-39-darwin.so

Additional context I'm on macOS 11.4 This issues is encountered in version 771eae5, the current master. This issues does not exist in release v1.4.0

[sidcha]

@qdx, thanks for reporting the issue. the c-utils submodule when through some cleanup which has caused this issue. I've fixed it now.

[sidcha]

Also added PyOSDP builds and import check to CI builds. This should not happen again, sorry about the hassle.