Fix/Feature: Objects via params using DSL

[itolosa]

Now it's possible to use dsl to build this type of queries:

ds.Mutation.login.args(
    email='user@example.com',
    password={'digest': 'ac67a676', 'algorithm': 'sha-256'}
  ).select(ds.LoginResponse.status)

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling a7e75eb on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling a7e75eb on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling a7e75eb on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling df06509 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling 8623878 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling 8623878 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling cd623c1 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling e20bef6 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling c66d350 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling 25b6ca1 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-24.9%) to 62.874% when pulling 3675966 on itolosa:master into 4193ace on graphql-python:master.

[coveralls]

Coverage decreased (-25.3%) to 62.5% when pulling 0b426c5 on itolosa:master into 4193ace on graphql-python:master.

[Cito]

Unfortunately, this has become so seriously outdated that it cannot be merged any more and I need to close this.

[KingDarBoja]

@Cito to be honest with you, several of these PR changes were used on the linked PRs in order to fix the DSL feature so not really a big lost for gql.