4.0.0

Changelog

• 4ef9132 update readme with v2 and v1.8 configuration examples
• 4fb94e1 preparing for 4.0.0 release
• f7d4122 Merge pull request #52 from sensu/js/refactor-support-v2
• d513681 Fix for mistaken case change in arguments during refactoring
• 23c5b65 update readme
• 867f6dd make linter happy
• f0d5128 update github action logic
• 21bfa80 complete refactor using test against influx 1.8.x in workshop environment
• fb34821 refactor precision argument to work with new influx client sdk
• 0f38c69 refactor to use latest sdk; fix testing
• 99de5c9 refactor to use latest influxdb go client with support for v1.8+ and v2.0+
• 2b4c658 Fix summary links in readme
• 01ee597 Update README with InfluxDBv2 compat instructions