Update changelog

Author: brianc

CHANGELOG.md

@@ -4,6 +4,15 @@ For richer information consult the commit log on github with referenced pull req
 
 We do not include break-fix version release in this file.
 
+### pg@8.7.0
+
+- Add optional config to [pool](https://github.com/brianc/node-postgres/pull/2568) to allow process to exit if pool is idle.
+
+### pg-cursor@2.7.0
+
+- Convert to [es6 class](https://github.com/brianc/node-postgres/pull/2553)
+- Add support for promises [to cursor methods](https://github.com/brianc/node-postgres/pull/2554)
+
 ### pg@8.6.0
 
 - Better [SASL](https://github.com/brianc/node-postgres/pull/2436) error messages & more validation on bad configuration.