Enable NullAway in junit-platform-suite-api

Author: marcphilipp

junit-platform-suite-api/junit-platform-suite-api.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
 	id("junitbuild.java-library-conventions")
+	id("junitbuild.java-nullability-conventions")
 }
 
 description = "JUnit Platform Suite API"
@@ -9,6 +10,7 @@ dependencies {
 	api(projects.junitPlatformCommons)
 
 	compileOnlyApi(libs.apiguardian)
+	compileOnly(libs.jspecify)
 
 	osgiVerification(projects.junitJupiterEngine)
 	osgiVerification(projects.junitPlatformLauncher)

junit-platform-suite-api/src/main/java/module-info.java

@@ -8,11 +8,14 @@
  * https://www.eclipse.org/legal/epl-v20.html
  */
 
+import org.jspecify.annotations.NullMarked;
+
 /**
  * Annotations for configuring a test suite on the JUnit Platform.
  *
  * @since 1.0
  */
+@NullMarked
 module org.junit.platform.suite.api {
 	requires static transitive org.apiguardian.api;
 	requires transitive org.junit.platform.commons;