Add utility function that retrieves the package versions

[BSchilperoort]

Closes #465

How to use:

>>> from ewatercycle.util import get_package_versions
>>> get_package_versions

{
    'ewatercycle': '2.3.1',
    'grpc4bmi': '0.5.0',
    'ewatercycle_hype': '0.0.1',
    'ewatercycle_HBV': '1.8.5',
    'ewatercycle_wflow': '0.0.2',
    'ewatercycle_marrmot': '0.0.2',
    'ewatercycle_lisflood': '0.0.1',
    'ewatercycle_pcrglobwb': '0.0.2'
}

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.32%. Comparing base (224383d) to head (a55a594).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ewatercycle/util.py	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #466      +/-   ##
==========================================
+ Coverage   79.29%   79.32%   +0.02%     
==========================================
  Files          28       28              
  Lines        1850     1862      +12     
  Branches      155      155              
==========================================
+ Hits         1467     1477      +10     
- Misses        325      327       +2     
  Partials       58       58              

Files with missing lines	Coverage Δ
src/ewatercycle/util.py	85.15% <83.33%> (-0.19%)	⬇️

[RolfHut]

I don't see why the test failed: it looks good to me. Do you see why it failed @BSchilperoort ? If you also think it looks ok, I will approve and merge.

[BSchilperoort]

I don't see why the test failed: it looks good to me. Do you see why it failed @BSchilperoort ? If you also think it looks ok, I will approve and merge.

An import in the test .py file was in the wrong order. I fixed it now.

[RolfHut]

ok now