Move eslint to dev dependencies

Author: brianc

package.json

@@ -26,17 +26,17 @@
     "concat-stream": "~1.0.1",
     "eslint": "^4.4.0",
     "eslint-config-standard": "^10.2.1",
+    "eslint-plugin-import": "^2.7.0",
+    "eslint-plugin-node": "^5.1.1",
+    "eslint-plugin-promise": "^3.5.0",
+    "eslint-plugin-standard": "^3.0.1",
     "mocha": "^3.5.0",
     "pg": "6.x",
     "stream-spec": "~0.3.5",
     "stream-tester": "0.0.5",
     "through": "~2.3.4"
   },
   "dependencies": {
-    "eslint-plugin-import": "^2.7.0",
-    "eslint-plugin-node": "^5.1.1",
-    "eslint-plugin-promise": "^3.5.0",
-    "eslint-plugin-standard": "^3.0.1",
     "pg-cursor": "1.3.0"
   }
 }