Bump gatsby-plugin-mdx from 1.1.7 to 1.1.9

Bumps [gatsby-plugin-mdx](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-mdx) from 1.1.7 to 1.1.9.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-mdx/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-plugin-mdx)

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

Author: dependabot-preview[bot]

packages/www/package.json

@@ -11,7 +11,7 @@
     "gatsby": "^2.20.22",
     "gatsby-plugin-eslint": "^2.0.8",
     "gatsby-plugin-manifest": "^2.3.6",
-    "gatsby-plugin-mdx": "^1.1.7",
+    "gatsby-plugin-mdx": "^1.1.9",
     "gatsby-plugin-react-helmet": "^3.2.4",
     "gatsby-plugin-sharp": "^2.5.4",
     "gatsby-plugin-styled-components": "^3.2.1",

yarn.lock

@@ -8933,10 +8933,10 @@ gatsby-plugin-manifest@^2.3.6:
     semver "^5.7.1"
     sharp "^0.25.1"
 
-gatsby-plugin-mdx@^1.1.7:
-  version "1.1.7"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.1.7.tgz#af94eff3f10ae2475ac0714b08f3e97d0fc77b0f"
-  integrity sha512-CTEeZQQ/hYDPv9mX06259zwiQc67OGBPzigBL8ZEMSgg5ANzzfR143Wd74RGPvT04GnMNjfWKcg8yBPTf75EaA==
+gatsby-plugin-mdx@^1.1.9:
+  version "1.1.9"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.1.9.tgz#92164a64c8e0a6bdc3098ee91a916f8ddddd9d8f"
+  integrity sha512-BdXe2pGPU9oN2LKJd4GJUC1KNtPRHnMit0CxlMHasrmzVDyGYjkG6EngL43LziLbDeYQQYdyPkWFe2+gsHlUOQ==
   dependencies:
     "@babel/core" "^7.8.7"
     "@babel/generator" "^7.8.8"
@@ -8953,7 +8953,7 @@ gatsby-plugin-mdx@^1.1.7:
     escape-string-regexp "^1.0.5"
     eval "^0.1.4"
     fs-extra "^8.1.0"
-    gatsby-core-utils "^1.1.1"
+    gatsby-core-utils "^1.1.3"
     gray-matter "^4.0.2"
     json5 "^2.1.2"
     loader-utils "^1.4.0"