go.mod: bump github.com/miekg/dns from 1.1.42 to 1.1.43

Bumps [github.com/miekg/dns](https://github.com/miekg/dns) from 1.1.42 to 1.1.43.
- [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/v1.1.42...v1.1.43)

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

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

go.mod

@@ -24,7 +24,7 @@ require (
 	github.com/klauspost/compress v1.13.6
 	github.com/mdlayher/netlink v1.4.1
 	github.com/mdlayher/sdnotify v0.0.0-20210228150836-ea3ec207d697
-	github.com/miekg/dns v1.1.42
+	github.com/miekg/dns v1.1.43
 	github.com/mitchellh/go-ps v1.0.0
 	github.com/pborman/getopt v1.1.0
 	github.com/peterbourgon/ff/v3 v3.1.0

go.sum

@@ -407,8 +407,8 @@ github.com/mdlayher/sdnotify v0.0.0-20210228150836-ea3ec207d697/go.mod h1:HtjVsQ
 github.com/mdlayher/socket v0.0.0-20210307095302-262dc9984e00 h1:qEtkL8n1DAHpi5/AOgAckwGQUlMe4+jhL/GMt+GKIks=
 github.com/mdlayher/socket v0.0.0-20210307095302-262dc9984e00/go.mod h1:GAFlyu4/XV68LkQKYzKhIo/WW7j3Zi0YRAz/BOoanUc=
 github.com/miekg/dns v1.0.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
-github.com/miekg/dns v1.1.42 h1:gWGe42RGaIqXQZ+r3WUGEKBEtvPHY2SXo4dqixDNxuY=
-github.com/miekg/dns v1.1.42/go.mod h1:+evo5L0630/F6ca/Z9+GAqzhjGyn8/c+TBaOyfEl0V4=
+github.com/miekg/dns v1.1.43 h1:JKfpVSCB84vrAmHzyrsxB5NAr5kLoMXZArPSw7Qlgyg=
+github.com/miekg/dns v1.1.43/go.mod h1:+evo5L0630/F6ca/Z9+GAqzhjGyn8/c+TBaOyfEl0V4=
 github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
 github.com/mitchellh/copystructure v1.0.0 h1:Laisrj+bAB6b/yJwB5Bt3ITZhGJdqmxquMKeZ+mmkFQ=
 github.com/mitchellh/copystructure v1.0.0/go.mod h1:SNtv71yrdKgLRyLFxmLdkAbkKEFWgYaq1OVrnRcwhnw=