v1.6.0

What's Changed

• Feat: add notification delay by @sbgap in #67
• Feat: add notification delay by @sbgap in gapitio/alerta#101
• fix: remove null variables from excluded_tags by @sbgap in gapitio/alerta#103
• fix: return count of notification history instead of count of notific… by @sbgap in gapitio/alerta#105

Full Changelog: v1.5.1...v1.6.0