Merge pull request #1772 from atom/greenkeeper/relay-compiler-1.7.0

Update relay-compiler to the latest version 🚀

Author: smashwilson

package-lock.json

@@ -100,7 +100,7 @@
     "mocha-stress": "1.0.0",
     "node-fetch": "2.3.0",
     "nyc": "13.0.0",
-    "relay-compiler": "1.6.2",
+    "relay-compiler": "1.7.0",
     "semver": "5.6.0",
     "sinon": "6.0.1",
     "test-until": "1.1.1"