Upgrade to css4j 5.3

Author: carlosame

build.gradle

@@ -12,11 +12,11 @@ description = 'css4j-awt'
 dependencies {
 	api('io.sf.carte:css4j') {
 		version {
-			strictly '[4.0,)'
-			prefer '5.2'
+			strictly '[5.3,)'
+			prefer '5.3'
 		}
 	}
-	testImplementation group: 'io.sf.carte', name: 'css4j', classifier: 'tests', version: '5.2'
+	testImplementation group: 'io.sf.carte', name: 'css4j', classifier: 'tests', version: '5.3'
 	testImplementation 'io.sf.carte:xml-dtd:4.3'
 	testImplementation 'nu.validator:htmlparser:1.4.16'
 	testImplementation 'org.slf4j:slf4j-api:2.0.17'