Add arty's auto config

Author: zephraph

package.json

@@ -55,6 +55,7 @@
     "typescript": ">=2.9.1"
   },
   "devDependencies": {
+    "@artsy/auto-config": "^0.0.8",
     "@types/graphql": "^0.12.1",
     "@types/invariant": "2.2.29",
     "@types/jest": "^22.0.1",

yarn.lock

@@ -2,6 +2,11 @@
 # yarn lockfile v1
 
 
+"@artsy/auto-config@^0.0.8":
+  version "0.0.8"
+  resolved "https://registry.yarnpkg.com/@artsy/auto-config/-/auto-config-0.0.8.tgz#8ed725ea865a2dd976e0b7da954c313d04b24f64"
+  integrity sha512-18INV7f1pqYYNxtlo/Ai9Sa24IrH/q/S+2flUw2/bWku9wAdjuRMB16+HhENO4mcQMIjw5LkfFxtrKVzpvganQ==
+
 "@babel/code-frame@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0.tgz#06e2ab19bdb535385559aabb5ba59729482800f8"