Add GraphQL variables

[joelvh]

This PR allows specifying GraphQL variables to the request. Keeps backward-compatibility.

[coveralls]

Coverage remained the same at 100.0% when pulling 85668e3 on joelvh:feature/graphql_variables into bc6f1f9 on MONEI:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 0d66e4f on joelvh:feature/graphql_variables into 1cf1817 on MONEI:master.

[joelvh]

@lpinca not sure if you're the primary guy, but wanted to see if you know why the coverage test is failing?

[lpinca]

probably because the additional if branch you added is not covered by a test.

[alexandresaiz]

@lpinca hey luigi. cana you decide on this PR?

[lpinca]

I will not review it until checks are green.

[lpinca]

FWIW I'm 👍 on the feature. I suggested it when GraphQL support was added. See #282 (comment).

[joelvh]

Got tests passing.

[joelvh]

@lpinca merge?

[lpinca]

Thanks, I will take a look when a I can.

[lpinca]

To keep the limit of 80 chars per line and be consistent with other test descriptions.

[joelvh]

@lpinca resolved conflicts - your updates should all be there.

[joelvh]

Now they should be there.

[lpinca]

Thank you.

[joelvh]

Yeah, something happened with the merge conflicts :-/ All good now. Thanks for approving!

[danalexilewis]

Just want to express my gratitude for this code - exactly what I needed! It will tidy up my string literals and also enable me to use types in my code! 🙏