Release 0.4.0

What's Changed

• Add Zenodo DOI to README by @fsoubelet in #89
• Adds check for non-existing knobs by @JoschD in #90
• Update CI by @fsoubelet in #91
• Lsa with timerange by @JoschD in #92

Release 0.4.0 brings the trim-history option to the machine-info extractor.
To enable this, one needs to provide a start_time.
The return values are now organized into a dictionary.

Full Changelog: 0.3.0...v0.4.0