Bug Fixes
1. [193](https://github.com/influxdata/influxdb-client-python/pull/193): Fixed `tasks_api` to use proper function to get `Run`
Documentation
1. [200](https://github.com/influxdata/influxdb-client-python/pull/200): Updated docs, examples, tests: use `close` instead of `__del__`.
CI
1. [199](https://github.com/influxdata/influxdb-client-python/pull/199): Updated stable image to `influxdb:latest` and nightly to `quay.io/influxdb/influxdb:nightly`