Chore: update to babel 7.5.4 (#1695)
Chore: update to babel 7.5.4 (#1695)

* chore(package): update @babel/core to version 7.5.4

* chore(package): update @babel/plugin-proposal-object-rest-spread to version 7.5.4

* chore(package): update @babel/preset-env to version 7.5.4

dequelabs/axe-core,dequelabs/axe-core,dequelabs/axe-core,dequelabs/axe-core