CSAF 0.26

- FIX "Possible precedence problem between ! and %s" in Perl 5.42
- Updated the minimum versions of some dependencies (GH#6)
- Use jsDelivr CDN for Gutenberg CSS in CSAF HTML template

Updated Changes

CSAF v0.24

- Improved default HTML template
- Improved "6.1.9 Invalid CVSS computation" (mandatory test)
- Added "6.3.9 Branch Categories" (informative test)
- Added "6.3.10 Usage of Product Version Range" (informative test)

Merge branch 'develop'

Updated MANIFEST