Several hotfixes since last major

Merge pull request #781 from jemten/feature/vcf2cytosure_sex

fix(vcf2cytosure_sex): accounts for unknown sex

v6.0.0

The major changes is described here:
#186

v4.0.0

Fixed merge conflict

v3.0.0

Merge branch 'release/v3.0.0'

v2.4.0

Improved stderr handling and stability for WGS

v2.2.2

v.2.2.2

v2.2.0

Merge branch 'release/2.2.0'

License and DOI

Including license and DOI