Update development dependencies

Author: dgraham

package-lock.json

@@ -28,16 +28,16 @@
     "babel-preset-es2015-rollup": "^3.0.0",
     "babel-preset-flow": "^6.23.0",
     "chai": "^4.1.2",
-    "eslint": "^5.4.0",
+    "eslint": "^5.5.0",
     "eslint-plugin-github": "^1.2.1",
-    "flow-bin": "^0.79.1",
+    "flow-bin": "^0.80.0",
     "karma": "^3.0.0",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.2.0",
     "karma-mocha": "^1.3.0",
     "karma-mocha-reporter": "^2.2.5",
     "mocha": "^5.2.0",
-    "rollup": "^0.64.1",
+    "rollup": "^0.65.2",
     "rollup-plugin-babel": "^3.0.7"
   }
 }