Note the Guava 21 is a requirement for java users

shs96c · shs96c · commit 8c03df6b7983 · 2017-02-23T10:38:48.000Z
Not updating to this version causes people to get
compilation errors when using ExpectedConditions.
diff --git a/java/CHANGELOG b/java/CHANGELOG
@@ -1,6 +1,8 @@
 v3.2.0
 ======
 
+* Updated Guava to version 21 and started using Java 8 features. Users
+  are recommended to update too.
 * Fix a problem starting Firefox caused by missing libraries
 * Experimental support for the W3C Action endpoints
 * Remove deprecated `FluentWait.until(Predicate<?>)` method. This
