prep for 4.2.0 release

Signed-off-by: Ben Abrams <me@benabrams.it>

Author: majormoses

CHANGELOG.md

@@ -4,6 +4,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 This CHANGELOG follows the format listed [here](https://github.com/sensu-plugins/community/blob/master/HOW_WE_CHANGELOG.md).
 
 ## [Unreleased]
+
+## [4.2.0] - 2020-11-29
 ### Added
 - new `bin/metric-postgres-relation-size.rb` find largest tables (@phumpal)
 
@@ -219,7 +221,8 @@ This CHANGELOG follows the format listed [here](https://github.com/sensu-plugins
 ### Added
 - initial release
 
-[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/4.1.0...HEAD
+[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/4.2.0...HEAD
+[4.2.0]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/4.1.0...4.2.0
 [4.1.0]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/4.0.2...4.1.0
 [4.0.2]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/4.0.1...4.0.2
 [4.0.1]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/4.0.0...4.0.1

lib/sensu-plugins-postgres/version.rb

@@ -3,7 +3,7 @@
 module SensuPluginsPostgres
   module Version
     MAJOR = 4
-    MINOR = 1
+    MINOR = 2
     PATCH = 0
 
     VER_STRING = [MAJOR, MINOR, PATCH].compact.join('.')