fix: package.json & package-lock.json to reduce vulnerabilities (#161)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-DOCSIFY-1090577

Author: snyk-bot

package-lock.json

@@ -57,7 +57,7 @@
     "connect": "^3.6.0",
     "connect-livereload": "^0.6.0",
     "cp-file": "^7.0.0",
-    "docsify": "^4.12.1",
+    "docsify": "^4.12.2",
     "docsify-server-renderer": ">=4.10.0",
     "enquirer": "^2.3.6",
     "fs-extra": "^8.1.0",