enable cache for build, closes #8 (#12)

* enable cache for build, closes #8
* goimports
* lint fixes

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

resolver/dns/dns.go

@@ -5,8 +5,8 @@ import (
 	"context"
 	"net"
 
-	"github.com/unistack-org/micro/v3/resolver"
 	"github.com/miekg/dns"
+	"github.com/unistack-org/micro/v3/resolver"
 )
 
 // Resolver is a DNS network resolve

resolver/registry/registry.go

@@ -2,9 +2,9 @@
 package registry
 
 import (
-	"github.com/unistack-org/micro/v3/resolver"
 	"github.com/unistack-org/micro/v3/registry"
 	"github.com/unistack-org/micro/v3/registry/mdns"
+	"github.com/unistack-org/micro/v3/resolver"
 )
 
 // Resolver is a registry network resolver