Update sbt-pgp from 0.8.1 to 0.8.3

Author: ngocdaothanh

dev/plugins.sbt.end

@@ -1,7 +1,7 @@
 
 // http://www.cakesolutions.net/teamblogs/2012/01/28/publishing-sbt-projects-to-nexus/
 // https://groups.google.com/forum/?fromgroups=#!topic/simple-build-tool/wuiMh-Ue_iw
-addSbtPlugin("com.typesafe.sbt" % "sbt-pgp" % "0.8.1")
+addSbtPlugin("com.typesafe.sbt" % "sbt-pgp" % "0.8.3")
 
 // https://github.com/jrudolph/sbt-dependency-graph
 addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.7.4")