bump version to 2.10.4

[holtzman]

Motivation

Update version strings in preparation for release v2.10.4

[docs-page]

To view this pull requests documentation preview, visit the following URL:

docs.page/mobilecoinofficial/full-service~1010

Documentation is deployed and generated using docs.page.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.03%. Comparing base (ab2af32) to head (9a1b0da).
Report is 210 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1010      +/-   ##
==========================================
+ Coverage   60.12%   69.03%   +8.90%     
==========================================
  Files          88      125      +37     
  Lines       12356    16629    +4273     
  Branches     2010     2793     +783     
==========================================
+ Hits         7429    11479    +4050     
- Misses       3238     5150    +1912     
+ Partials     1689        0    -1689     

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