Update library version to 1.8.8

[Enkidu93]

Needed for sillsdev/silnlp#1021.

We don't need the target/source refs PR to go through since that code isn't really used through the library, only in the docker image. If you'd rather wait until it's in, we certainly can.

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This change is 

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.53%. Comparing base (e245623) to head (0171376).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #301   +/-   ##
=======================================
  Coverage   91.53%   91.53%           
=======================================
  Files         355      355           
  Lines       23028    23028           
=======================================
  Hits        21079    21079           
  Misses       1949     1949           

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[ddaspit]

@ddaspit reviewed 1 file and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on Enkidu93).