Bump sbt to 1.8.3

Change-Id: Ic29d8cf1215e954cb2834808a5730113b4bef626

build.sbt

diff --git a/build.sbt b/build.sbt
index 9e5666c..55e9522 100644
--- a/build.sbt
+++ b/build.sbt
@@ -31,9 +31,9 @@
       "org.scalatest" %% "scalatest" % "3.0.1" % Test,
       "net.codingwell" %% "scala-guice" % "5.0.0" % Test),
 
-    assemblyJarName in assembly := s"$pluginName.jar",
+    assembly / assemblyJarName := s"$pluginName.jar",
 
-    packageOptions in(Compile, packageBin) += Package.ManifestAttributes(
+    Compile / packageBin / packageOptions += Package.ManifestAttributes(
       ("Gerrit-ApiType", "plugin"),
       ("Gerrit-PluginName", pluginName),
       ("Gerrit-Module", "com.googlesource.gerrit.plugins.analytics.Module"),

project/build.properties

diff --git a/project/build.properties b/project/build.properties
index 0cd8b07..72413de 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.2.3
+sbt.version=1.8.3