Bump github.com/nats-io/nats-server/v2 from 2.8.2 to 2.8.4

Bumps [github.com/nats-io/nats-server/v2](https://github.com/nats-io/nats-server) from 2.8.2 to 2.8.4.
- [Release notes](https://github.com/nats-io/nats-server/releases)
- [Changelog](https://github.com/nats-io/nats-server/blob/main/.goreleaser.yml)
- [Commits](https://github.com/nats-io/nats-server/compare/v2.8.2...v2.8.4)

---
updated-dependencies:
- dependency-name: github.com/nats-io/nats-server/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -42,7 +42,7 @@ require (
 	github.com/libregraph/lico v0.54.1-0.20220325072321-31efc3995d63
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
-	github.com/nats-io/nats-server/v2 v2.8.2
+	github.com/nats-io/nats-server/v2 v2.8.4
 	github.com/oklog/run v1.1.0
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/onsi/ginkgo v1.16.5
@@ -208,7 +208,7 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/mschoch/smat v0.2.0 // indirect
 	github.com/nats-io/jwt/v2 v2.2.1-0.20220330180145-442af02fd36a // indirect
-	github.com/nats-io/nats.go v1.14.0 // indirect
+	github.com/nats-io/nats.go v1.15.0 // indirect
 	github.com/nats-io/nkeys v0.3.0 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/nxadm/tail v1.4.8 // indirect