chore(package): update @babel/preset-env to version 7.7.1

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
   "devDependencies": {
     "@babel/core": "^7.7.0",
     "@babel/plugin-proposal-class-properties": "7.7.0",
-    "@babel/preset-env": "^7.5.5",
+    "@babel/preset-env": "^7.7.1",
     "@babel/preset-react": "7.0.0",
     "@storybook/addon-actions": "^5.1.9",
     "@storybook/addon-knobs": "^5.1.9",