Bump gatsby-plugin-styled-components from 3.1.19 to 3.1.20

Bumps [gatsby-plugin-styled-components](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-styled-components) from 3.1.19 to 3.1.20.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-styled-components/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-plugin-styled-components)

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

Author: dependabot-preview[bot]

packages/www/package.json

@@ -19,7 +19,7 @@
     "gatsby-plugin-offline": "^3.0.35",
     "gatsby-plugin-react-helmet": "^3.1.23",
     "gatsby-plugin-sharp": "^2.4.5",
-    "gatsby-plugin-styled-components": "^3.1.19",
+    "gatsby-plugin-styled-components": "^3.1.20",
     "gatsby-plugin-typescript": "^2.2.0",
     "gatsby-remark-images": "^3.1.47",
     "gatsby-source-filesystem": "^2.1.51",

yarn.lock

@@ -8803,10 +8803,10 @@ gatsby-plugin-sharp@^2.4.5:
     svgo "1.3.2"
     uuid "^3.3.3"
 
-gatsby-plugin-styled-components@^3.1.19:
-  version "3.1.19"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-styled-components/-/gatsby-plugin-styled-components-3.1.19.tgz#6251e2c872a7f48d93dca0868ac534e761fc6b89"
-  integrity sha512-ME4NSuFe6zzF/PqEoLRt6Xo7su484zwByOsQtQDK4U+X62tXgl+DfsW6Dz1p1k258OeN+uqJERQDaFlfWhfaAw==
+gatsby-plugin-styled-components@^3.1.20:
+  version "3.1.20"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-styled-components/-/gatsby-plugin-styled-components-3.1.20.tgz#2c34dd785a002a95d2bcfca841bb2416928e07b7"
+  integrity sha512-ledGQkZL9DS40IrhbJudZPAIc9gDqL+WcjB630JhT7bJvA0Ss8ugnAHKJYrVslbeCgWUg3ey07NnmLePoaLnXQ==
   dependencies:
     "@babel/runtime" "^7.7.6"