* Breaking change: Hard require package options "type", "modifier"
and "version" now after one year in soft require migration period.
* Add Croatian translation.
* Add sections to docs about choosing a license and the REUSE specification.
* Update Spanish translation to match Creative Commons website.
* Add note to README that CC license texts and images are licensed
themselves under CC0-1.0.
* Load csquotes after hyperref to avoid hyperref warning.
* Do not load the hyperxmp package if the silence package is loaded
to avoid an endless loop.
* Improve warning messages generated by the package.
* Add "Dependency packages and load order" section to docs.
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