fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BUNYAN-573166

Author: snyk-bot

package-lock.json

@@ -37,7 +37,7 @@
     "@types/tunnel": "0.0.1",
     "async": "^2.6.2",
     "aws-sdk": "^2.633.0",
-    "bunyan": "^1.8.12",
+    "bunyan": "^1.8.13",
     "child-process-promise": "^2.2.1",
     "lru-cache": "^5.1.1",
     "needle": "^2.5.0",