Bump gatsby-plugin-postcss from 2.1.10 to 2.3.6

Bumps [gatsby-plugin-postcss](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-postcss) from 2.1.10 to 2.3.6.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-postcss/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-plugin-postcss)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package.json

@@ -10,7 +10,7 @@
     "gatsby-image": "^2.2.23",
     "gatsby-plugin-manifest": "^2.2.20",
     "gatsby-plugin-offline": "^3.0.13",
-    "gatsby-plugin-postcss": "^2.1.10",
+    "gatsby-plugin-postcss": "^2.3.6",
     "gatsby-plugin-react-helmet": "^3.1.21",
     "gatsby-plugin-sharp": "^2.2.27",
     "gatsby-source-filesystem": "^2.1.57",

yarn.lock

@@ -903,10 +903,10 @@
     core-js-pure "^3.0.0"
     regenerator-runtime "^0.13.4"
 
-"@babel/runtime@^7.1.2", "@babel/runtime@^7.3.4", "@babel/runtime@^7.4.5", "@babel/runtime@^7.6.2", "@babel/runtime@^7.6.3", "@babel/runtime@^7.7.2", "@babel/runtime@^7.7.6", "@babel/runtime@^7.8.4", "@babel/runtime@^7.8.7", "@babel/runtime@^7.9.2", "@babel/runtime@^7.9.6":
-  version "7.9.6"
-  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.9.6.tgz#a9102eb5cadedf3f31d08a9ecf294af7827ea29f"
-  integrity sha512-64AF1xY3OAkFHqOb9s4jpgk1Mm5vDZ4L3acHvAml+53nO1XbXLuDodsVpO4OIUsmemlUHMxNdYMNJmsvOwLrvQ==
+"@babel/runtime@^7.1.2", "@babel/runtime@^7.10.3", "@babel/runtime@^7.3.4", "@babel/runtime@^7.4.5", "@babel/runtime@^7.6.2", "@babel/runtime@^7.6.3", "@babel/runtime@^7.7.2", "@babel/runtime@^7.7.6", "@babel/runtime@^7.8.4", "@babel/runtime@^7.8.7", "@babel/runtime@^7.9.2", "@babel/runtime@^7.9.6":
+  version "7.10.3"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.10.3.tgz#670d002655a7c366540c67f6fd3342cd09500364"
+  integrity sha512-RzGO0RLSdokm9Ipe/YD+7ww8X2Ro79qiXZF3HU9ljrM+qnJmH1Vqth+hbiQZy761LnMJTMitHDuKVYTk3k4dLw==
   dependencies:
     regenerator-runtime "^0.13.4"
 
@@ -5791,12 +5791,12 @@ gatsby-plugin-page-creator@^2.3.1:
     lodash "^4.17.15"
     micromatch "^3.1.10"
 
-gatsby-plugin-postcss@^2.1.10:
-  version "2.1.10"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-postcss/-/gatsby-plugin-postcss-2.1.10.tgz#c0c86887a596f970a62d0ddf61259058ac04db54"
-  integrity sha512-hXqzqVjTTKvjzG4U9D0/jf9mHjzjjTUVQxDcG/p94B/ccdTt4K48/46+AdrgBwfMOKGfGi8sa8krtk8jNs7J8g==
+gatsby-plugin-postcss@^2.3.6:
+  version "2.3.6"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-postcss/-/gatsby-plugin-postcss-2.3.6.tgz#d0d8b19f9edf845b54ea49a2cdd9ceb2a52f10f5"
+  integrity sha512-rJ7GihxGc6pA3KapR2kFPYkDyVc/18Yt2nROxL893epv2nYn99H2XaeLOFvglr6FrpFkJP0TvUvwDOfQOuTz8A==
   dependencies:
-    "@babel/runtime" "^7.6.2"
+    "@babel/runtime" "^7.10.3"
     postcss-loader "^3.0.0"
 
 gatsby-plugin-react-helmet@^3.1.21:
@@ -10561,11 +10561,6 @@ prettier@^2.0.5:
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.0.5.tgz#d6d56282455243f2f92cc1716692c08aa31522d4"
   integrity sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==
 
-prettier@^2.0.5:
-  version "2.0.5"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.0.5.tgz#d6d56282455243f2f92cc1716692c08aa31522d4"
-  integrity sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==
-
 pretty-bytes@^5.1.0, pretty-bytes@^5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/pretty-bytes/-/pretty-bytes-5.3.0.tgz#f2849e27db79fb4d6cfe24764fc4134f165989f2"