update to sbt-2.0.0-RC3

use `@transient` annotation introduced in sbt/sbt#8210

Author: mzuehlke

build.sbt

@@ -24,7 +24,7 @@ libraryDependencies ++= Seq(
 (pluginCrossBuild / sbtVersion) := {
   scalaBinaryVersion.value match {
     case "2.12" => "1.5.8"
-    case _ => "2.0.0-RC2"
+    case _ => "2.0.0-RC3"
   }
 }
 

src/main/scala-2.12/PluginCompat.scala

@@ -2,7 +2,6 @@ package com.github.sbt.git
 
 import sbt.*
 import Keys.*
-import PluginCompat.*
 
 /** This plugin has all the basic 'git' functionality for other plugins. */
 object SbtGit {
@@ -22,7 +21,7 @@ object SbtGit {
     val gitUncommittedChanges = SettingKey[Boolean]("git-uncommitted-changes", "Whether there are uncommitted changes.")
 
     // A Mechanism to run Git directly.
-    @cacheLevel(include = Array.empty)
+    @transient
     val gitRunner = TaskKey[GitRunner]("git-runner", "The mechanism used to run git in the current build.")
 
     // Keys associated with setting a version number.