chore(package): update @babel/plugin-proposal-decorators to version 7.10.1

Closes #1502

Author: greenkeeper[bot]

package.json

@@ -75,7 +75,7 @@
   },
   "devDependencies": {
     "@babel/core": "7.10.1",
-    "@babel/plugin-proposal-decorators": "7.8.3",
+    "@babel/plugin-proposal-decorators": "7.10.1",
     "@babel/plugin-transform-regenerator": "7.8.7",
     "@babel/plugin-transform-runtime": "7.8.3",
     "@babel/preset-env": "7.8.7",