Set release date

oschwald · oschwald · commit 43539dc9fec0 · 2018-01-18T13:28:42.000-08:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,7 +1,7 @@
 CHANGELOG
 =========
 
-2.8.0
+2.8.0 (2018-01-18)
 ------------------
 
 - The `isInEuropeanUnion` property was added to `GeoIp2\Record\Country`
