Issue # 256 bed sanity checking

[Qwertille42]

PR checklist

• This comment contains a description of changes (with reason). I do a check where I see the indexing format of the bed and then I convert 0-indexing bed files to be 1-indexing to make them comparable with vcf files indexing.
• If you've fixed a bug or added code that should be tested, add tests!
• Ensure the test suite passes (nextflow run . -profile test,docker --outdir <OUTDIR>).
• Check for unexpected warnings in debug mode (nextflow run . -profile debug,test,docker --outdir <OUTDIR>).

[nf-core-bot]

Warning

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[maxulysse]

CHANGELOG update?

[kubranarci]

Thanks for PR! Looks good to me