Added date for 4.0.0 CHANGELOG.md (#756)

Nyholm · web-flow · commit cd0d7e9c3a69 · 2017-08-01T10:45:09.000+02:00
* Update CHANGELOG.md

* Wrong year..
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,7 +1,7 @@
 CHANGELOG
 =========
 
-### 4.0.0 (2016-xx-xx)
+### 4.0.0 (2017-08-01)
 
 * Dropped support for PHP < 7
 * Introduced `GeocodeQuery` and `ReverseQuery`. 
