Release 0.2.3

[jeromekelleher]

No description provided.

[codecov]

Codecov Report

Merging #421 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #421   +/-   ##
=======================================
  Coverage   86.67%   86.67%           
=======================================
  Files          20       20           
  Lines       14257    14257           
  Branches     2774     2774           
=======================================
  Hits        12357    12357           
  Misses        978      978           
  Partials      922      922

Flag	Coverage Δ
#c_tests	87.78% <100%> (ø)	⬆️
#python_c_tests	90.48% <100%> (ø)	⬆️
#python_tests	99.23% <100%> (ø)	⬆️

Impacted Files	Coverage Δ
python/tskit/_version.py	100% <100%> (ø)	⬆️

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