build(deps): Bump github.com/imdario/mergo from 0.3.11 to 0.3.12

Bumps [github.com/imdario/mergo](https://github.com/imdario/mergo) from 0.3.11 to 0.3.12.
- [Release notes](https://github.com/imdario/mergo/releases)
- [Commits](darccio/mergo@v0.3.11...0.3.12)

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

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/gomodule/redigo v2.0.0+incompatible
 	github.com/google/uuid v1.2.0
 	github.com/gorilla/mux v1.8.0
-	github.com/imdario/mergo v0.3.11
+	github.com/imdario/mergo v0.3.12
 	github.com/lib/pq v1.9.0
 	github.com/pkg/errors v0.8.1
 	github.com/robfig/cron v0.0.0-20180505203441-b41be1df6967