bump version

[boydm]

Description

Bump the version to 0.10.4 in advance of releasing to hex.

Motivation and Context

Types of changes

• [ ] Bug fix (a non-breaking change which fixes an issue)
• [ ] New feature (a non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Improvement/refactoring (non-breaking change that doesn't add any feature but make things better)

Checklist

• [ ] Check other PRs and make sure that the changes are not done yet.
• [ ] The PR title is no longer than 64 characters.

[codecov[bot]]

Codecov Report

Merging #218 (84dea2e) into master (f51788e) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #218   +/-   ##
=======================================
  Coverage   86.66%   86.66%           
=======================================
  Files          87       87           
  Lines        2340     2340           
=======================================
  Hits         2028     2028           
  Misses        312      312           

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