Update to dnssd v1.2.1

Author: brutella

go.mod

@@ -1,7 +1,7 @@
 module github.com/brutella/hc
 
 require (
-	github.com/brutella/dnssd v1.2.0
+	github.com/brutella/dnssd v1.2.1
 	github.com/miekg/dns v1.1.4 // indirect
 	github.com/tadglines/go-pkgs v0.0.0-20140924210655-1f86682992f1
 	github.com/xiam/to v0.0.0-20191116183551-8328998fc0ed

go.sum

@@ -1,5 +1,5 @@
-github.com/brutella/dnssd v1.2.0 h1:bgrSycmZ2+u4BoJxRf1BzSlnViSAfeXWVdujqjLA004=
-github.com/brutella/dnssd v1.2.0/go.mod h1:FpJqlQ8+XU6w1vbnG1zJiQPTRE5fvQIRdrcBojMVuuQ=
+github.com/brutella/dnssd v1.2.1 h1:1xG+5itx/SDEP6ukYfAcBnox5WACTNvxZ+SMkAmSrFU=
+github.com/brutella/dnssd v1.2.1/go.mod h1:FpJqlQ8+XU6w1vbnG1zJiQPTRE5fvQIRdrcBojMVuuQ=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/miekg/dns v1.1.1/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=