chore: bump to 3.4.0

chore: bump to 3.3.1

feat: release 3.3.0

feat: release 3.2.0

Merge pull request iloire#43 from iloire/issue-44-only-notify-on-sust…

…ained-outages

Issue 44 - only notify on sustained outages

Remove 'npm install' from precoverage script

Release notes for 2.5.0

Use 24h format

Add 2.3.0 release notes to README

Bump to 2.2.0