resolver: lts-18.16

extra-deps:
- hakyll-4.15.1.0@sha256:df90fdb1e7e09e90557ad23a6d402ce042f820f690595e7e73db82220edcadcf,9924
- hakyll-sass-0.2.4@sha256:4d2fbd8b63f5ef15483fc6dda09e10eefd63b4f873ad38dec2a3607eb504a8ba,939