Add JDK 19 support

Author: marchof

src/main/java/io/javaalmanac/javadoclink/JavaDocLinkImpl.java

@@ -81,6 +81,7 @@ final class JavaDocLinkImpl implements JavaDocLink {
 		VERSIONS.put("16", VERSIONS.get("11"));
 		VERSIONS.put("17", VERSIONS.get("11"));
 		VERSIONS.put("18", VERSIONS.get("11"));
+		VERSIONS.put("19", VERSIONS.get("11"));
 	}
 
 	private final String base;

src/test/java/io/javaalmanac/javadoclink/JavaDocLinkTest.java

@@ -122,6 +122,7 @@ private boolean hasNoElement(Document doc, String element, String attr, String v
 		JDK_API_DOC.put("16", "https://docs.oracle.com/en/java/javase/16/docs/api/");
 		JDK_API_DOC.put("17", "https://docs.oracle.com/en/java/javase/17/docs/api/");
 		JDK_API_DOC.put("18", "https://download.java.net/java/early_access/jdk18/docs/api/");
+		JDK_API_DOC.put("19", "https://download.java.net/java/early_access/jdk19/docs/api/");
 	}
 
 }