build: upgrade sbt-git plugin

Hopefully will address dependency issue on CodeBuild with failures to download org.eclipse.jgit-4.9.0.201710071750-r.jar

Author: edalex-ian

project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("de.heikoseeberger" % "sbt-header" % "5.4.0")
 
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.10")
 
-addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "1.0.0")
+addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "1.0.2")
 
 addSbtPlugin("de.johoop" % "sbt-testng-plugin" % "3.1.1")