Assorted build updates

* drop sbt-release
* swap to sbt-gpg
* disable fatal warnings
* update back-publish script

build.sbt

@@ -104,8 +104,10 @@ lazy val `kind-projector` = project
     crossTarget := target.value / s"scala-${scalaVersion.value}", // workaround for https://github.com/sbt/sbt/issues/5097
     crossVersion := CrossVersion.full,
     crossScalaVersions := (ThisBuild / crossScalaVersions).value,
-    releaseCrossBuild := true,
-    releasePublishArtifactsAction := PgpKeys.publishSigned.value,
+    publishMavenStyle := true,
+    sonatypeProfileName := organization.value,
+    publishTo := sonatypePublishToBundle.value,
+    sonatypeCredentialHost := "s01.oss.sonatype.org",
     publishTo := Some(if (isSnapshot.value) Opts.resolver.sonatypeSnapshots else Opts.resolver.sonatypeStaging),
     Compile / unmanagedSourceDirectories ++= {
       (Compile / unmanagedSourceDirectories).value.flatMap { dir =>
@@ -125,7 +127,6 @@ lazy val `kind-projector` = project
       "-deprecation",
       "-unchecked",
     ),
-    Compile / compile / scalacOptions += "-Xfatal-warnings",
     Test / scalacOptions ++= {
       val jar = (Compile / packageBin).value
       Seq("-Yrangepos", s"-Xplugin:${jar.getAbsolutePath}", s"-Jdummy=${jar.lastModified}") // ensures recompile

project/plugins.sbt

@@ -1,4 +1,3 @@
-addSbtPlugin("com.github.sbt" % "sbt-pgp"      % "2.1.2")
-addSbtPlugin("com.github.sbt" % "sbt-release"  % "1.1.0")
+addSbtPlugin("io.crashbox" % "sbt-gpg" % "0.2.1")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.9.10")
 addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.19.0")

scripts/back-publish

@@ -4,7 +4,7 @@ set -e
 
 usage() {
     echo "Usage: $0 [-t <tag>] [-s <scala_version>]" 1>&2
-    echo "Example: $0 -t v0.13.2 -s 2.13.8"
+    echo "Example: $0 -t v0.13.3 -s 2.13.14"
 }
 
 while getopts "s:t:" OPTION; do
@@ -34,4 +34,4 @@ if [ "$JAVA_VERSION" -ne 8 ]; then
 fi
 
 git checkout $TAG
-sbt ++$SCALA_VERSION 'set sonatypeCredentialHost := "s01.oss.sonatype.org"' 'set `kind-projector`/sonatypeCredentialHost := "s01.oss.sonatype.org"' 'set publishTo := Some(MavenRepository("sonatype-s01-releases", "https://s01.oss.sonatype.org/service/local/staging/deploy/maven2"))' clean test publishSigned sonatypeRelease
+sbt ++$SCALA_VERSION clean test publish sonatypeBundleRelease