build(deps): bump github.com/miekg/dns from 1.1.30 to 1.1.31 (#4043)

Bumps [github.com/miekg/dns](https://github.com/miekg/dns) from 1.1.30 to 1.1.31.
- [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/v1.1.30...v1.1.31)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/infobloxopen/go-trees v0.0.0-20190313150506-2af4e13f9062
 	github.com/kr/pretty v0.2.0 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1
-	github.com/miekg/dns v1.1.30
+	github.com/miekg/dns v1.1.31
 	github.com/opentracing-contrib/go-observer v0.0.0-20170622124052-a52f23424492 // indirect
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/openzipkin-contrib/zipkin-go-opentracing v0.3.5

go.sum

@@ -340,6 +340,8 @@ github.com/mholt/certmagic v0.8.3/go.mod h1:91uJzK5K8IWtYQqTi5R2tsxV1pCde+wdGfaR
 github.com/miekg/dns v1.1.15/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
 github.com/miekg/dns v1.1.30 h1:Qww6FseFn8PRfw07jueqIXqodm0JKiiKuK0DeXSqfyo=
 github.com/miekg/dns v1.1.30/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
+github.com/miekg/dns v1.1.31 h1:sJFOl9BgwbYAWOGEwr61FU28pqsBNdpRBnhGXtO06Oo=
+github.com/miekg/dns v1.1.31/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 github.com/mitchellh/go-vnc v0.0.0-20150629162542-723ed9867aed/go.mod h1:3rdaFaCv4AyBgu5ALFM0+tSuHrBh6v692nyQe3ikrq0=