Implement safer dependency parsing

[drdavella]

Overview

Make dependency parsing safer and more tolerant of unexpected conditions

Description

• The heuristics we use to gather packaging metadata are necessarily messy
• We need them to be highly fault tolerant to handle lots of unexpected situations
• Under no circumstances should a failure to parse dependencies cause codemodder to crash

[codecov]

Codecov Report

Merging #159 (f3eb073) into main (c058932) will decrease coverage by 0.12%.
The diff coverage is 94.59%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #159      +/-   ##
==========================================
- Coverage   96.46%   96.35%   -0.12%     
==========================================
  Files          75       75              
  Lines        3452     3456       +4     
==========================================
  Hits         3330     3330              
- Misses        122      126       +4     

Files	Coverage Δ
...der/project_analysis/file_parsers/package_store.py	100.00% <100.00%> (ø)
...lysis/file_parsers/requirements_txt_file_parser.py	100.00% <100.00%> (ø)
...ject_analysis/file_parsers/setup_py_file_parser.py	100.00% <100.00%> (ø)
...nalysis/file_parsers/pyproject_toml_file_parser.py	93.33% <87.50%> (-6.67%)	⬇️
...ect_analysis/file_parsers/setup_cfg_file_parser.py	93.75% <80.00%> (-6.25%)	⬇️
...odder/project_analysis/file_parsers/base_parser.py	93.33% <83.33%> (-6.67%)	⬇️