fix: upgrade mysql2 from 2.0.0 to 2.1.0 (#308)

Snyk has created this PR to upgrade mysql2 from 2.0.0 to 2.1.0.

See this package in NPM:
https://www.npmjs.com/package/mysql2

See this project in Snyk:
https://app.snyk.io/org/tobitenno/project/24182a0b-1038-4b1e-b19f-3a04c511bdc9?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -47,7 +47,7 @@
     "json-query": "^2.2.2",
     "moment": "^2.24.0",
     "ms": "^2.1.2",
-    "mysql2": "^2.0.0",
+    "mysql2": "^2.1.0",
     "node-fetch": "^2.6.0",
     "node-wikia": "0.0.3",
     "numeral": "^2.0.6",