fix: append task option at the end of script

[bednar]

trafficstars

Related to https://github.com/influxdata/influxdb-client-python/issues/490

Proposed Changes

Append task option at the end of script. It allows create task with following Flux:

procTotal = from(bucket: "example-bucket")
    |> range(start: -5m)
    |> filter(fn: (r) => r._measurement == "processes" and r._field == "total")

procTotal

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] A test has been added if appropriate
• [x] dotnet test completes successfully
• [x] Commit messages are conventional
• [x] Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #348 (61cab1d) into master (efc943b) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #348   +/-   ##
=======================================
  Coverage   87.37%   87.37%           
=======================================
  Files          76       76           
  Lines        6637     6637           
=======================================
  Hits         5799     5799           
  Misses        838      838           

Impacted Files	Coverage Δ
Client/TasksApi.cs	88.42% <100.00%> (ø)

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