Updates GraphQL version to 1.2.0 for sub support

Author: Jay Herron

Package.resolved

@@ -10,13 +10,22 @@
           "version": "2.1.2"
         }
       },
+      {
+        "package": "Graphiti",
+        "repositoryURL": "https://github.com/GraphQLSwift/Graphiti.git",
+        "state": {
+          "branch": null,
+          "revision": "35cf75fd6506042e1132f308b0c446858dba85f0",
+          "version": "0.22.1"
+        }
+      },
       {
         "package": "GraphQL",
         "repositoryURL": "https://github.com/GraphQLSwift/GraphQL.git",
         "state": {
           "branch": null,
-          "revision": "21104b805ad7de5a223b0d78e0cf5d9d49465ac4",
-          "version": "1.1.8"
+          "revision": "abf41c20c79331444ee3a290373d7c647c244383",
+          "version": "1.2.0"
         }
       },
       {

Package.swift

@@ -7,7 +7,7 @@ let package = Package(
         .library(name: "GraphQLRxSwift", targets: ["GraphQLRxSwift"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/GraphQLSwift/GraphQL.git", .upToNextMajor(from: "1.1.7")),
+        .package(url: "https://github.com/GraphQLSwift/GraphQL.git", .upToNextMajor(from: "1.2.0")),
         .package(url: "https://github.com/GraphQLSwift/Graphiti.git", .upToNextMinor(from: "0.22.0")),
         .package(url: "https://github.com/ReactiveX/RxSwift.git", .upToNextMajor(from: "6.1.0"))
     ],