Update relay to latest

[codenem]

We should update to latest version of relay.
This would allow us to split the GraphQL schema into multiple files and thus maintain our API better

[yashhhguptaaa]

Hey @codenem, could you assign this issue to me? I’d like to work on it. Have opened the PR as well. I'll check with the existing graphql api as well, that there should be no side effect because of the upgrade.