fix jitpack build [skip-ci]

gradle/plugins/src/main/kotlin/lifecycle/publish.caffeine.gradle.kts

@@ -1,10 +1,13 @@
 plugins {
-  id("dev.sigstore.sign")
   `maven-publish`
   `java-library`
   signing
 }
 
+if (System.getenv("ACTIONS_ID_TOKEN_REQUEST_URL") != null) {
+  apply(plugin = "dev.sigstore.sign")
+}
+
 java {
   withJavadocJar()
   withSourcesJar()

jcache/src/test/java/com/github/benmanes/caffeine/jcache/processor/EntryProcessorTest.java

@@ -18,6 +18,7 @@
 import static com.google.common.base.MoreObjects.firstNonNull;
 import static com.google.common.collect.ImmutableMap.toImmutableMap;
 import static com.google.common.truth.Truth.assertThat;
+import static java.util.Objects.requireNonNull;
 import static java.util.function.Function.identity;
 import static javax.cache.expiry.Duration.FIVE_MINUTES;
 
@@ -141,7 +142,8 @@ final class MapLoader implements CacheLoader<Integer, Integer> {
       return map.get(key);
     }
     @Override public ImmutableMap<Integer, Integer> loadAll(Iterable<? extends Integer> keys) {
-      return Streams.stream(keys).collect(toImmutableMap(identity(), this::load));
+      return Streams.stream(keys).collect(
+          toImmutableMap(identity(), key -> requireNonNull(load(key))));
     }
   }
 }

jitpack.yml

@@ -1,5 +1,5 @@
 before_install:
   - source "$HOME/.sdkman/bin/sdkman-init.sh"
   - sdk update
-  - sdk install java 21.0.3-zulu
-  - sdk use java 21.0.3-zulu
+  - sdk install java 21.0.5-zulu
+  - sdk use java 21.0.5-zulu