chore(package): update jest-styled-components to version 7.0.2

Closes #48

Author: greenkeeper[bot]

package.json

@@ -61,7 +61,7 @@
     "file-loader": "^3.0.0",
     "html-webpack-plugin": "^3.2.0",
     "jest": "^23.6.0",
-    "jest-styled-components": "^6.2.1",
+    "jest-styled-components": "^7.0.2",
     "jsdoc": "^3.5.5",
     "minami": "^1.2.3",
     "mini-css-extract-plugin": "^0.7.0",