Update https://github.com/gohugoio/hugo in repo_dependencies.yml from v0.30 to v0.31

[dependencies]

Dependencies.io has updated https://github.com/gohugoio/hugo (a git dependency in repo_dependencies.yml) from "v0.30" to "v0.31".

v0.31

Hugo 0.31 is the Language Multihost Edition!

The Multihost feature is sponsored by eSolia, rickcogley's company.

Multihost means that you can have a baseURL per language, for example, https://no.example.com and https://en.example.com. This is seamlessly integrated, and the built-in web server with live reload and navigateToChanged etc. just works. A related enhancement in this release is the support for as many static dirs as you need, with intelligent language overrides, forming a big union file system. Add to that several other language related fixes and enhancements, it is safe to say that this is the version you want for multilingual Hugo sites!

This release represents 44 contributions by 7 contributors to the main Hugo code base.
bep leads the Hugo development with a significant amount of contributions, but also a big shoutout to @kaushalmodi, @natefinch, and @betaveros for their ongoing contributions.
And as always a big thanks to digitalcraftsman for his relentless work on keeping the documentation and the themes site in pristine condition.

Many have also been busy writing and fixing the documentation in hugoDocs,
which has received 13 contributions by 9 contributors. A special thanks to oncletom, @kaushalmodi, @XhmikosR, and @digitalcraftsman for their work on the documentation site.

Hugo now has:

• 21105+ stars
• 455+ contributors
• 184+ themes

Notes

• For mapping of translated content, Hugo now considers the full path of the content file, which makes it possible with translation of duplicate content filenames such as index.md. A specific translation key can be specified with the new translationKey front matter variable. See #2699.

Enhancements

Language related

• Support unknown language codes 23ba779f bep #3564
• Fix .IsTranslated with identical filenames b3daa1f4 bep #2699
• Fall back to unstranslated base template 0a81a6b4 bep #3893
• Add support for multiple static dirs 60dfb9a6 bep #36#4027
• Add multilingual multihost support 2e046576 bep #4027

Templates

• Refactor Mod with cast 76dc811c artem-sidorenko
• Add support for height argument to figure shortcode 488631fe kaushalmodi #4014

Core

• Use ms precision for static change logging bb048d81 bep
• Update Chroma to get the latest SASS lexer b32ffed6 bep #4069
• Bump to Go 1.9.2 9299a16c bep #4064
• Update Travis and snapcraft to Go 1.9.2 77cbd001 bep #4064
• Handle Taxonomy permalinks d9a78b61 betaveros #1208

Other

• Support Fast Render mode with sub-path in baseURL 31641033 bep #3981
• Simplify Site benchmarks c3c10f2c bep
• Replace make with mage to build Hugo #3969
• Convert to dep as dependency/vendor manager for Hugo #3988
• Pre-allocate some slices a9be687b bep

Fixes

Templates

• Make sure only one instance of a cached partial is rendered #4086

Other

• Fix broken shortcodes for Ace and Amber 503ca6de bep #4051
• Fix error handling in mage build c9c19d79 natefinch
• Fix hugo -w fa53b13c bep #3980

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