Bump to Gerrit 2.16 API and associated deps

Update Gerrit 2.16 API and the other libraries versions that
are included in runtime.

NOTE: joda-time isn't used anymore in Gerrit. However, it is
still used in the analytics plugin and thus needs to be preserved.

Change-Id: Ic8bc4bd31f2d9e56c6944134ea0ff49965c47ec7

build.sbt

diff --git a/build.sbt b/build.sbt
index 9082863..f0cee33 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 enablePlugins(GitVersioning)
 
-val gerritApiVersion = "2.15.3"
+val gerritApiVersion = "2.16-SNAPSHOT"
 
 val pluginName = "analytics"
 
@@ -9,8 +9,8 @@
 lazy val root = (project in file("."))
   .settings(
     name := pluginName,
-
-    version := "2.14-SNAPSHOT",
+    resolvers += Resolver.mavenLocal,
+    version := "2.16-SNAPSHOT",
 
     scalaVersion := "2.11.8",
 
@@ -20,8 +20,8 @@
 
       "com.google.inject" % "guice" % "4.2.0" % Provided,
       "com.google.gerrit" % "gerrit-plugin-api" % gerritApiVersion % Provided withSources(),
-      "com.google.code.gson" % "gson" % "2.8.0" % Provided,
-      "joda-time" % "joda-time" % "2.9.9" % Provided,
+      "com.google.code.gson" % "gson" % "2.8.5" % Provided,
+      "joda-time" % "joda-time" % "2.9.9",
 
       "org.scalatest" %% "scalatest" % "3.0.1" % Test,
       "net.codingwell" %% "scala-guice" % "4.1.0" % Test),