Update changelog and news.

CHANGELOG.rst

@@ -13,6 +13,15 @@ Welcome to the running release notes of ATMO!
 
 - Dependency updates are only mentioned when they require user attention.
 
+2019.1.0
+--------
+
+:date: 2019-01-18
+
+The flag to not repeatedly send cluster expiration emails is now reset
+whenever a cluster's lifetime is extended, meaning that expiration emails
+are now sent for each extension instead of only the initial lifetime.
+
 2018.8.0
 --------
 

NEWS.md

@@ -1,3 +1,12 @@
+### 2019.1.0
+
+#### Cluster expiration emails sent for extended clusters
+
+We're now sending cluster expiration emails when clusters
+are extended (for each extension). Previously the expiration
+email was only sent once for the initial cluster lifetime
+and not the extended lifetime(s).
+
 ### 2018.8.0
 
 #### Larger EMR clusters for data engineers