Moves TSLint to dev dependencies.

Author: ashfurrow

package.json

@@ -43,8 +43,7 @@
   },
   "dependencies": {
     "immutable": "^3.7.6",
-    "invariant": "^2.2.2",
-    "tslint": "^5.11.0"
+    "invariant": "^2.2.2"
   },
   "peerDependencies": {
     "@types/react-relay": ">=1.3.9",
@@ -73,6 +72,7 @@
     "relay-test-utils":
       "https://github.com/alloy/relay/releases/download/v1.6.1-plugin.1/relay-test-utils-1.6.1-plugin.1.tgz",
     "ts-jest": "^22.0.1",
+    "tslint": "^5.11.0",
     "tslint-config-prettier": "^1.15.0",
     "typescript": "2.8.1"
   },