Broaden Gradle version compatibility testing

Author: wilkinsona

src/test/java/io/spring/gradle/dependencymanagement/GradleVersionCompatibilityIntegrationTests.java

@@ -50,7 +50,7 @@ void pluginIsCompatible(String gradleVersion) {
 
 	static List<String[]> gradleVersions() {
 		List<String> versions = Arrays.asList("6.8.3", "6.9.4", "7.0.2", "7.1.1", "7.2", "7.3.3", "7.4.2", "7.5.1",
-				"8.0.2", "8.1.1", "8.2.1");
+				"8.0.2", "8.1.1", "8.2.1", "8.3", "8.4", "8.5", "8.6", "8.7");
 		List<String[]> result = new ArrayList<>();
 		for (String version : versions) {
 			result.add(new String[] { version });