Pinned pandoc-types version not compatible with latest Hakyll

[duvallj]

This package is pinned to versions of pandoc-types (>=1.17.6.1 && <1.18 || ==1.20.*) while Hakyll 4.13.4.1 now requires pandoc == 2.10.* which in turn requires pandoc-types == 1.21.*.

I tried compiling with the newer pandoc-types anyways using Stack's allow-newer: true option, and everything still seemed to work fine. I also tested with pandoc-types == 1.22.* and that worked as well. Can we bump dependency version for this package to be pandoc-types (>=1.17.6.1 && <1.18 || >=1.20 ) perhaps?