Bump agenda from 3.1.2 to v4.2.1

Bumps [agenda](https://github.com/RocketChat/agenda) from 3.1.2 to v4.2.1.
- [Release notes](https://github.com/RocketChat/agenda/releases)
- [Changelog](https://github.com/RocketChat/agenda/blob/master/History.md)
- [Commits](RocketChat/agenda@c2cfcc5...4973a7a)

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

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

Author: dependabot[bot]

package-lock.json

@@ -172,7 +172,7 @@
 		"@slack/client": "^4.12.0",
 		"@types/lodash": "^4.14.171",
 		"adm-zip": "0.4.14",
-		"agenda": "github:RocketChat/agenda#3.1.2",
+		"agenda": "github:RocketChat/agenda#v4.2.1",
 		"apn": "2.2.0",
 		"archiver": "^3.1.1",
 		"arraybuffer-to-string": "^1.0.2",