restBase not being used in api request

[corywebb]

See ba8a052#diff-07975b2f8d9d9adc2d9fdc0acf38cfa1R202

The API request to fetch the full post was updated in the commit above, but that code has not been built into the deployed index.js file. That file still has path: "/wp/v2/".concat(t.subtype, "s/").concat(t.id), so it is adding an "s" to the end of the subtype name for custom post types. This is throwing a network error if the post type's rest base is different from the post type name with an "s" on the end of it.