Use virtual environment when creating requirements file

[delucchi-cmu]

See reasoning and more details in #409

[github-actions]

Before [7e098c3] <v0.4.0>	After [d1573cf]	Ratio	Benchmark (Parameter)
failed	failed	n/a	benchmarks.BinningSuite.time_read_histogram

Click here to view all benchmarks.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.06%. Comparing base (829fe47) to head (2d5824c).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #410      +/-   ##
==========================================
- Coverage   99.73%   99.06%   -0.68%     
==========================================
  Files          26       29       +3     
  Lines        1520     1607      +87     
==========================================
+ Hits         1516     1592      +76     
- Misses          4       15      +11     

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