chore(resolver): export structs instead of interfaces

internal/provider/fastestvpn/updater/resolve.go

@@ -6,7 +6,7 @@ import (
 	"github.com/qdm12/gluetun/internal/updater/resolver"
 )
 
-func newParallelResolver() resolver.Parallel {
+func newParallelResolver() *resolver.Parallel {
 	const (
 		maxFailRatio = 0.1
 		maxNoNew     = 1

internal/provider/fastestvpn/updater/updater.go

@@ -1,13 +1,13 @@
 package fastestvpn
 
 import (
-	"github.com/qdm12/gluetun/internal/updater/resolver"
+	"github.com/qdm12/gluetun/internal/provider/common"
 	"github.com/qdm12/gluetun/internal/updater/unzip"
 )
 
 type Updater struct {
 	unzipper  unzip.Unzipper
-	presolver resolver.Parallel
+	presolver common.ParallelResolver
 	warner    Warner
 }