chore(deps): update dependency generate-changelog to v1.8.0

Author: renovate-bot

package-lock.json

@@ -38,7 +38,7 @@
     "eslint-plugin-node": "6.0.1",
     "eslint-plugin-promise": "3.8.0",
     "eslint-plugin-standard": "3.1.0",
-    "generate-changelog": "1.7.1",
+    "generate-changelog": "1.8.0",
     "husky": "0.14.3",
     "lint-staged": "7.3.0",
     "prettier-standard": "8.0.1"