Set 1.7.0 release date

danielnelson · danielnelson · commit 97ee4995a4cf · 2018-06-12T11:48:23.000-07:00
(cherry picked from commit d2e00a3)
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## v1.7 [unreleased]
+## v1.7 [2018-06-12]
 
 ### Release Notes
 
