chore(updater): incorporate FetchServers method in Provider interface

- Each provider interface can now fetch updated servers data
- Rename each provider updater subpackage name to `updater`
- Updater constructor does not take a settings struct
- Updater update method takes in a slice of provider strings

internal/vpn/run.go

@@ -2,11 +2,13 @@ package vpn
 
 import (
 	"context"
+	"net/http"
 	"time"
 
 	"github.com/qdm12/gluetun/internal/constants"
 	"github.com/qdm12/gluetun/internal/constants/vpn"
 	"github.com/qdm12/gluetun/internal/provider"
+	"github.com/qdm12/gluetun/internal/updater/unzip"
 	"github.com/qdm12/log"
 )
 
@@ -27,10 +29,16 @@ func (l *Loop) Run(ctx context.Context, done chan<- struct{}) {
 		return
 	}
 
+	// Updater only objects which are unused in this loop
+	updaterWarner := (log.LoggerInterface)(nil)
+	updaterClient := (*http.Client)(nil)
+	updaterUnzipper := (unzip.Unzipper)(nil)
+
 	for ctx.Err() == nil {
 		settings := l.state.GetSettings()
 
-		providerConf := provider.New(*settings.Provider.Name, l.storage, time.Now)
+		providerConf := provider.New(*settings.Provider.Name, l.storage, time.Now,
+			updaterWarner, updaterClient, updaterUnzipper)
 
 		portForwarding := *settings.Provider.PortForwarding.Enabled
 		var vpnRunner vpnRunner