Updated graphiql view template with latest version from master branch

[4levels]

Copied the graphiql.php view file from master

[coveralls]

Coverage remained the same at 71.549% when pulling 8ea1d49 on 4levels:feature/relay into 11ef6fb on Folkloreatelier:feature/relay.

[dmongeau]

Thanks for this.
One thing, I was using superagent because fetch doesn't seems to be compatible with laravel-debugbar and I found it useful to be able to inspect everything when doing query in graphiql. Maybe laravel-debugbar updated to catch fetch requests, we will need to check

[4levels]

Hi,

this wast just a minimal effort of my side (copy paste from master).
I never saw the Graphiql interface play nice with errors, I always have to use the dev-tools to view the actual errors. I didn't notice a change here after I updated the file, but I might be not looking in the right place.

I struggled a lot to get Relay Mutations working with Lumen and in the process I ended up using the latest versions as seen in the master branch.

Just my 2 cents ;-)

Kind regards,

Erik