update README

Author: andre15silva

README.md

@@ -6,8 +6,8 @@
 * **Ease of use**: With an intuitive, reliable and stable API, flacoco can be easily used in other projects such as automated program repair tools.
 * **Compatibility**: 
     * Supports JUnit3, JUnit4 and JUnit5.
-    * Supports Java 1 to Java 17 bytecode.
-    * Runs on Java 8 to Java 17.
+    * Supports Java 1 to Java 18 bytecode.
+    * Runs on Java 8 to Java 18.
     * Runs on Linux, MacOS and Windows.
 * **Stability**: Tests are executed in an isolated JVM.