Bump gatsby from 2.17.0 to 2.17.4

Bumps [gatsby](https://github.com/gatsbyjs/gatsby) from 2.17.0 to 2.17.4.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/compare/gatsby@2.17.0...gatsby@2.17.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -7536,10 +7536,10 @@ functional-red-black-tree@^1.0.1:
   resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
   integrity sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=
 
-gatsby-cli@^2.8.3:
-  version "2.8.3"
-  resolved "https://registry.yarnpkg.com/gatsby-cli/-/gatsby-cli-2.8.3.tgz#42d147b345712ec0486649137f8647760a83475e"
-  integrity sha512-HJUIuRz9CR2q/Yxm79ps79Kh5dtuUDytnGdPlsO8HiYVO7vZUxDEUW/5rYxBpiLqL17uUL/UFFuLfhm/F/xuCQ==
+gatsby-cli@^2.8.5:
+  version "2.8.5"
+  resolved "https://registry.yarnpkg.com/gatsby-cli/-/gatsby-cli-2.8.5.tgz#5c11a455c73cca949fab6b0a7ca46cd8c10ee3d7"
+  integrity sha512-kkbVnCxSrqJDMq/H3FaqG4ptJSt+8etMTfrHDWy/Ju0GbhSmuW66jB/JVlOzsAY0BjHpGik4+bT/OmRmmbKmIQ==
   dependencies:
     "@babel/code-frame" "^7.5.5"
     "@babel/runtime" "^7.6.3"
@@ -7726,9 +7726,9 @@ gatsby-telemetry@^1.1.33:
     uuid "3.3.3"
 
 gatsby@^2.13.48:
-  version "2.17.0"
-  resolved "https://registry.yarnpkg.com/gatsby/-/gatsby-2.17.0.tgz#f4a0dbe4d6897f32df3019d33ef4dee5d30b5aab"
-  integrity sha512-bi+Hv6nLj6u1eH/qNR8Df7yjSSNWje4GuP3IKS0l/dBH+a4WDZTuh8OR4oby9M06lwXfi8kfUlRStDzzjthfQA==
+  version "2.17.4"
+  resolved "https://registry.yarnpkg.com/gatsby/-/gatsby-2.17.4.tgz#0f23ed27dfdd7ae9904e631835e0910a574db0cc"
+  integrity sha512-U5DMlIn1MM7n187LF5lFVcSxQyBq+p9QU+fj/xInLBlnT4uIyl1/2hPhG/26tLn0FKulJbYOu8U0HgAK7UmSyw==
   dependencies:
     "@babel/code-frame" "^7.5.5"
     "@babel/core" "^7.6.4"
@@ -7790,7 +7790,7 @@ gatsby@^2.13.48:
     flat "^4.1.0"
     fs-exists-cached "1.0.0"
     fs-extra "^8.1.0"
-    gatsby-cli "^2.8.3"
+    gatsby-cli "^2.8.5"
     gatsby-core-utils "^1.0.15"
     gatsby-graphiql-explorer "^0.2.25"
     gatsby-link "^2.2.22"