Updated changelog to 2.4

doc/Changelog.html

@@ -44,6 +44,42 @@ <h1>Java API Compliance<br/>Checker: History</h1>
 <p/>
 <br/>
 
+<b>Version 2.4 (January 20, 2018)</b><br/>
+<b>Improvements</b>
+<ul>
+    <li>
+        Support for Java 9
+    </li>
+    <li>
+        Check for changes in annotation elements
+    </li>
+    <li>
+        Dump default values of annotation elements
+    </li>
+    <li>
+        Added -non-impl option to specify interfaces that should not be implemented by users
+    </li>
+    <li>
+        Added -non-impl-all option to tell the tool that all interfaces should not be implemented by users
+    </li>
+    <li>
+        Added -check-annotations option to check for changes in annotation types like in other interfaces
+    </li>
+    <li>
+        Added more regression tests
+    </li>
+</ul>
+<b>Other</b>
+<ul>
+    <li>
+        Changed license to LGPL-2.1+
+    </li>
+    <li>
+        Bumped API dump version to 2.4
+    </li>
+</ul>
+<br/>
+
 <b>Version 2.3 (August 30, 2017)</b><br/>
 <b>Bug Fixes</b>
 <ul>