chore(package): update eslint-plugin-unicorn to version 7.1.0

Closes #42

Author: greenkeeper[bot]

package.json

@@ -52,7 +52,7 @@
     "eslint-plugin-prettier": "^2.1.2",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-react": "^7.1.0",
-    "eslint-plugin-unicorn": "^4.0.2",
+    "eslint-plugin-unicorn": "^7.1.0",
     "husky": "^0.14.0",
     "lint-staged": "^7.0.0",
     "npm-run-all": "^4.0.0",