Add module-info.java

Author: oschwald

CHANGELOG.md

@@ -5,6 +5,7 @@ CHANGELOG
 ------------------
 
 * Java 11 or greater is now required.
+* This library is now a Java module.
 
 2.1.0 (2022-10-31)
 ------------------

src/main/java/module-info.java

@@ -0,0 +1,3 @@
+module com.maxmind.db {
+    exports com.maxmind.db;
+}