<1.16 Support and MORE fixes

It has come to my attention this plugin doesn't inherit the dependency's versions. I've gone ahead and added support for 1.7-1.16.

This also fixes some more response serialization.

Thank you for enjoying the plugin!

Fix some oopsies!

As this is a beta, I have discovered and patched some bugs you may have run into.

e4a2382 - Fixed unnecessary String wrapping. If a JSON string was provided, it would be wrapped, causing an invalid JSON to be returned. Now, it will only be wrapped if there's no response.
c57672a - Also fixed response headers for some errors. They would sometimes show up in the request, which isn't good either.

Thank you for using the plugin!

Initial release

Initial release.

Please report bugs in the issue tab above. Thank you!