add sbt-release in artifact-migrations.conf

[xuwei-k]

• use sbt-ci-release. change groupId sbt/sbt-release#278
• https://repo1.maven.org/maven2/com/github/sbt/sbt-release_2.12_1.0/

[codecov]

Codecov Report

Merging #1951 (a0845b3) into master (f28737d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1951   +/-   ##
=======================================
  Coverage   78.35%   78.35%           
=======================================
  Files         129      129           
  Lines        2227     2227           
  Branches       60       60           
=======================================
  Hits         1745     1745           
  Misses        482      482           

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[fthomas]

Thanks @xuwei-k!