Update sbt-ci-release to 1.7.0 (#295)

Author: scala-steward

project/plugins.sbt

@@ -7,6 +7,6 @@ addSbtPlugin("org.scalablytyped.converter" % "sbt-converter"            % "1.0.0
 // sane scalac options
 addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.2")
 
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.6.1")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.7.0")
 
 addSbtPlugin("com.thoughtworks.sbt-scala-js-map" % "sbt-scala-js-map" % "4.1.1")