Enhancements

• Initial query/write support for InfluxDB 2.x added
• Logging configuration fetched at runtime instead of during compilation
• The HTTP client library can be replaced by providing a custom implementation of the Instream.HTTPClient behaviour

Backwards incompatible changes

• Minimum required elixir version is now ~> 1.9
• Passing a host to ping/1,2, status/1,2, version/1,2 is now longer supported. Only the hostname configured in the connection module will be used.
• Support for the InfluxDB versions earlier than 1.7.x is no longer guaranteed