Bump mysql2 from f6a9b68 to 58f8d00

Bumps [mysql2](https://github.com/brianmario/mysql2) from `f6a9b68` to `58f8d00`.
- [Release notes](https://github.com/brianmario/mysql2/releases)
- [Commits](brianmario/mysql2@f6a9b68...58f8d00)

---
updated-dependencies:
- dependency-name: mysql2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/brianmario/mysql2
-  revision: f6a9b68b42a51d1a370403f11eb88527dcb42dc6
+  revision: 58f8d009a0d107776dd6d24c9906426fe0f7b856
   specs:
     mysql2 (0.5.6)
       bigdecimal