v0.66.0

This release adds inline @import support to resources.PostCSS, with imports relative to Hugo's virtual, composable file system. Another useful addition is the new build configuration section. As an example in config.toml:

[build]
  useResourceCacheWhen = "always"

The above will tell Hugo to always use the cached build resources inside resources/_gen for the build steps requiring a non-standard dependency (PostCSS and SCSS/SASS). Valid values are never, always and fallback (default).

This release represents 27 contributions by 8 contributors to the main Hugo code base.@bep leads the Hugo development with a significant amount of contributions, but also a big shoutout to @anthonyfok, @carlmjohnson, and @sams96 for their ongoing contributions.
And a big thanks to @digitalcraftsman and @onedrawingperday for their relentless work on keeping the themes site in pristine condition and to @davidsneighbour and @kaushalmodi for all the great work on the documentation site.

Many have also been busy writing and fixing the documentation in hugoDocs,
which has received 8 contributions by 5 contributors. A special thanks to @bep, @nantipov, @regisphilibert, and @inwardmovement for their work on the documentation site.

Hugo now has:

• 41984+ stars
• 439+ contributors
• 299+ themes

Enhancements

Templates

• Change error message on missing resource d7798906 @sams96 #6942
• Add math.Sqrt d184e505 @StarsoftAnalysis #6941

Other

• Skip some tests on CircleCI 6a34f88d @bep
• {{ in }} should work with html.Template type ae383f04 @carlmjohnson #7002
• Regen CLI docs ee31e61f @bep
• Add --all flag to hugo mod clean 760a87a4 @bep
• Add build.UseResourceCacheWhen 3d3fa5c3 @bep #6993
• Update dependency list in README.md ee3d0213 @anthonyfok
• Add full filename to image when processing fails 305ce1c9 @bep #7000
• Update dependency list in README 449deb7f @anthonyfok
• Add basic @import support to resources.PostCSS b66d38c4 @bep #6957#6961
• Implement include/exclude filters for deploy 05a74eae @vangent #6922
• Update to Go 1.14 and 1.13.8 33ae6210 @bep #6958
• Add hugo.IsProduction function 1352bc88 @hcwong #6873
• Apply missing go fmt 76b2afe6 @bep

Fixes

Output

• Fix panic on no output formats f4605303 @bep #6924

Core

• Fix error handling in page collector 3e9db2ad @bep #6988
• Fix 2 Paginator.Pages taxonomy regressions 7ef5a4c8 @bep #6921#6918
• Fix deletion of orphaned sections a70bbd06 @bep #6920

Other

• Fix ref/relref short lookup for pages in sub-folder 8947c3fa @bep #6952
• Fix ref/relRef regression for relative refs from bundles 1746e8a9 @bep #6952
• Fix potential infinite recursion in server change detection 6f48146e @bep #6986
• Fix rebuild logic when editing template using a base template b0d85032 @bep #6968
• Fix panic when home page is drafted 0bd6356c @bep #6927
• Fix goldmark toc rendering ca68abf0 @satotake #6736#6809
• Fix crashes for 404 in IsAncestor etc. a524124b @bep #6931
• Fix panic in 404.Parent 4c2a0de4 @bep #6924