chore(deps): update dependency styled-components to v3.1.6

Author: renovate-bot

package.json

@@ -62,7 +62,7 @@
     "react": "16.2.0",
     "react-dom": "16.2.0",
     "react-test-renderer": "16.2.0",
-    "styled-components": "3.1.4"
+    "styled-components": "3.1.6"
   },
   "babel": {
     "presets": [

yarn.lock

@@ -7522,9 +7522,9 @@ style-loader@^0.19.1:
     loader-utils "^1.0.2"
     schema-utils "^0.3.0"
 
-[email protected].4:
-  version "3.1.4"
-  resolved "https://registry.yarnpkg.com/styled-components/-/styled-components-3.1.4.tgz#1bdc1409c9bacafee3510c573d23b73039b0d875"
+[email protected].6:
+  version "3.1.6"
+  resolved "https://registry.yarnpkg.com/styled-components/-/styled-components-3.1.6.tgz#9c443146fa82c6659a9f64dd493bf2202480342e"
   dependencies:
     buffer "^5.0.3"
     css-to-react-native "^2.0.3"