chore(package): update @babel/plugin-transform-object-assign to version 7.8.3

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "@babel/core": "7.9.0",
     "@babel/helper-module-imports": "7.8.3",
     "@babel/plugin-external-helpers": "7.8.3",
-    "@babel/plugin-transform-object-assign": "7.2.0",
+    "@babel/plugin-transform-object-assign": "7.8.3",
     "@babel/preset-env": "7.5.5",
     "@mediagoom/devman": "0.0.12",
     "autoprefixer": "^9.5.0",