Update lodash 4.18.1 (#1418)

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>

Author: peterzhuamazon

package.json

@@ -47,7 +47,7 @@
     "cipher-base": "^1.0.7",
     "sha.js": "^2.4.12",
     "qs": "^6.14.1",
-    "lodash": "^4.17.23",
+    "lodash": "^4.18.0",
     "bn.js": "^4.12.3"
   },
   "devDependencies": {