prep for 5.0.0 release

Merge pull request sensu-plugins#123 from nixwiz/pre_release/4.1.1

Prepping for 4.1.1 release

Merge pull request sensu-plugins#121 from nixwiz/pre_release/4.1.0

Prepping 4.1 release that includes additional asset builds

Merge pull request sensu-plugins#97 from sensu-plugins/release/4.0.0

prepping for 4.0.0 release

prep for 3.2.1 release

prep for 3.2.0 release

prep for 3.1.2 release

prep for 3.1.1 release

prep for 3.1.0 release

prep for 3.0.0 release