Format extension for QRadar not applicable

[raul-developer]

I tried to run "sigma convert -t qradar -f extension -o rules-extension.zip ./tests/files/valid/sigma_rule.yml" but I received following error:

Invalid value for format: Output format 'extensions' is not supported by backend 'qradar'. Run sigma list formats qradar to list all available formats of the target.

[thomaspatzke]

Just created a PR with the fix for this. @nNipsx-Sec please merge and release if appropriate 😉

[nNipsx-Sec]

I agreed with this PR, but i'm found issue with DropDetectionItemTransformation @thomaspatzke can you check issue on pysigma ?

[thomaspatzke]

I will check it!