chore(deps): update dependency graphql-tools to v4.0.4

Author: renovate-bot

package.json

@@ -28,7 +28,7 @@
     "ava": "0.25.0",
     "graphql": "0.13.2",
     "graphql-middleware": "1.7.8",
-    "graphql-tools": "4.0.3",
+    "graphql-tools": "4.0.4",
     "prettier": "1.14.3",
     "prettier-check": "2.0.0",
     "semantic-release": "15.8.1",

yarn.lock

@@ -1846,9 +1846,9 @@ graphql-middleware@1.7.8:
   dependencies:
     graphql-tools "^4.0.2"
 
-graphql-tools@4.0.3:
-  version "4.0.3"
-  resolved "https://registry.yarnpkg.com/graphql-tools/-/graphql-tools-4.0.3.tgz#23b5cb52c519212b1b2e4630a361464396ad264b"
+graphql-tools@4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/graphql-tools/-/graphql-tools-4.0.4.tgz#ca08a63454221fdde825fe45fbd315eb2a6d566b"
   dependencies:
     apollo-link "^1.2.3"
     apollo-utilities "^1.0.1"