Robotkernel

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- Add to auto-import nbimporter when available to make it possible to
import eg. keyword libraries from Python notebooks
[datakurre]
- Fix issue where nbrobot did support %%python module magic
[datakurre]

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- Add to require robotframework >= 3.1b1 in requires

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Breaking:

- Requires robotframework >= 3.1b1

Other:

- Add to create nbreader and nblibdoc cli to run robot with notebook reader
support
[datakurre]
- Add Selenium completions to sometimes include raw Simmer results with
simplfied id completion results
[datakurre]
- Add proof-of-concept selector completion for Appium and AutoIT libraries
[datakurre]
- Fix screenshot processor to also discover images with absolute path or within
the current working directory
[datakurre]

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This is the last release compatible with robotframework < 3.1

- Remove deprecated replace-flag from kernel installer
[datakurre]

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- Fix compatibility issue with robotframework < 3.1
[datakurre]

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- Fix issue where kernel installation produced broken kernel.json on Windows
[datakurre]