Ibbend

Batching POST request is locked on nanosecond timeprecision

1

__Steps to reproduce:__ Instantiate the session similarly to: ``` influxdb = InfluxDB2::Client.new("http://#{INFLUXDB_HOST}:8086", INFLUXDB_TOKEN, bucket: INFLUXDB_DATA, org: INFLUXDB_ORG, use_ssl: false, precision: InfluxDB2::WritePrecision::SECOND) write_options = InfluxDB2::WriteOptions.new(write_type: InfluxDB2::WriteType::BATCHING, batch_size: 100, flush_interval: 90_000, max_retries:...