Update environment.yml, and replace setup.py with pyproject.toml

[chrisjonesBSU]

This is a temporary fix that makes sure environment.yml installs all dependencies. MorphCT installs correctly and pytests are passing. There is still some work required to update to newer versions of dependencies (See #52)

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 84.94%. Comparing base (7df91fa) to head (4763b45).
⚠️ Report is 15 commits behind head on master.

Files with missing lines	Patch %	Lines
morphct/chromophores.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #53      +/-   ##
==========================================
- Coverage   85.22%   84.94%   -0.29%     
==========================================
  Files           9        8       -1     
  Lines         765      764       -1     
==========================================
- Hits          652      649       -3     
- Misses        113      115       +2     

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