Merge pull request #147 from NeedleInAJayStack/feat/graphql-sdl

Merge pull request #137 from abidon/main

Merge pull request #136 from GraphQLSwift/feature/oneOfAndSpecifiedBy

Adds `oneOf` and `specifiedBy` directive support

Merge pull request #131 from cshadek/feature/arguments-public-inits

Adds public inits for all 3 paginatable arguments structs

Merge pull request #129 from NeedleInAJayStack/feature/drop-type-coda…

…ble-requirement

Drops Encodable requirement on GraphQL types

Merge pull request #126 from cshadek/public_no_arguments

Made inits public for NoArguments and PageInfo

Merge pull request #118 from NeedleInAJayStack/feature/scalar-extensions

Scalar customizations

Merge pull request #120 from NeedleInAJayStack/fix/identifier-availab…

…ility

fix: Updates Identifier availability flag

Merge pull request #114 from samisuteria/samisuteria/execute-helper

Add helper to API.execute