Update version to 3.7.9

[Enkidu93]

Required for sillsdev/serval#827

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This change is 

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.47%. Comparing base (611b978) to head (32db8ef).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #358   +/-   ##
=======================================
  Coverage   72.47%   72.47%           
=======================================
  Files         422      422           
  Lines       35803    35803           
  Branches     4949     4949           
=======================================
  Hits        25947    25947           
  Misses       8760     8760           
  Partials     1096     1096           

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[ddaspit]

@ddaspit reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Enkidu93)