Switch from python-ligo-lw to igwn-ligolw

[eagoetz]

Like gwdetchar, this PR changes the dependency from python-ligo-lw to igwn-ligolw.

An example showing this works using igwn-ligolw: https://ldas-jobs.ligo-wa.caltech.edu/~evan.goetz/triggers.png

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.22%. Comparing base (2c205e5) to head (feb8805).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #434   +/-   ##
=======================================
  Coverage   49.22%   49.22%           
=======================================
  Files          60       60           
  Lines        8801     8801           
=======================================
  Hits         4332     4332           
  Misses       4469     4469           

Flag	Coverage Δ
Linux-python3.10	49.22% <100.00%> (ø)
Linux-python3.11	49.22% <100.00%> (ø)
macOS-python3.10	49.22% <100.00%> (ø)
macOS-python3.11	49.22% <100.00%> (ø)

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[robertbruntz]

Three suggestions:

• Does ./docs/environment.yml need to be updated?
• Maybe update docstring, lines 68-71, in ./gwsumm/tabs/etg.py
• Maybe update docstring, lines 117-120, in ./gwsumm/triggers.py

[eagoetz]

Three suggestions:

* Does ./docs/environment.yml need to be updated?

* Maybe update docstring, lines 68-71, in ./gwsumm/tabs/etg.py

* Maybe update docstring, lines 117-120, in ./gwsumm/triggers.py

These are addressed @robertbruntz. Please have a second look. Thanks for catching this!

[robertbruntz]

LGTM!