chore(deps): bump github.com/miekg/dns from 1.1.43 to 1.1.50 (#385)

Bumps [github.com/miekg/dns](https://github.com/miekg/dns) from 1.1.43 to 1.1.50.
- [Release notes](https://github.com/miekg/dns/releases)
- [Changelog](https://github.com/miekg/dns/blob/master/Makefile.release)
- [Commits](https://github.com/miekg/dns/compare/v1.1.43...v1.1.50)

---
updated-dependencies:
- dependency-name: github.com/miekg/dns
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/google/uuid v1.3.0
 	github.com/gorilla/mux v1.8.0
 	github.com/lib/pq v1.10.7
-	github.com/miekg/dns v1.1.43
+	github.com/miekg/dns v1.1.50
 	github.com/prometheus/client_golang v1.14.0
 	github.com/wcharczuk/go-chart/v2 v2.1.0
 	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9