Adopt compatibility testing plugin

Closes gh-728

spring-restdocs-core/build.gradle

@@ -1,6 +1,6 @@
 plugins {
+	id "io.spring.compatibility-test" version "0.0.1"
 	id "java-library"
-	id "matrixtest"
 	id "maven-publish"
 	id "optional-dependencies"
 }
@@ -76,9 +76,9 @@ artifacts {
 	testArtifacts testJar
 }
 
-matrixTest {
-	springFramework {
-		group = "org.springframework"
-		versions = ["5.1.+", "5.2.+"]
+compatibilityTest {
+	dependency("Spring Framework") { springFramework ->
+		springFramework.groupId = "org.springframework"
+		springFramework.versions = ["5.1.+", "5.2.+", "5.3.+"]
 	}
 }