chore: release 3.1.0

Author: nh13

version.sbt

@@ -4,5 +4,5 @@ gitHeadCommitSha in ThisBuild := scala.sys.process.Process("git rev-parse --shor
 // *** IMPORTANT ***
 val _version = "3.1.0"
 // One of the two "version" lines below needs to be uncommented.
-// ThisBuild / version := _version // the release version
-ThisBuild / version := s"${_version}-${gitHeadCommitSha.value}-SNAPSHOT" // the snapshot version
+ThisBuild / version := _version // the release version
+//ThisBuild / version := s"${_version}-${gitHeadCommitSha.value}-SNAPSHOT" // the snapshot version