Upgrade system and package versions

- Alpine from 3.12 to 3.13 and:
- Openvpn from 2.4.10 to 2.5.1
- Unbound from 1.10.1 to 1.13.0
- Iptables from 1.8.4 to 1.8.6

internal/provider/fastestvpn.go

@@ -136,7 +136,8 @@ func (f *fastestvpn) BuildConf(connection models.OpenVPNConnection,
 		"auth-user-pass " + constants.OpenVPNAuthConf,
 		"proto " + connection.Protocol,
 		"remote " + connection.IP.String() + " " + strconv.Itoa(int(connection.Port)),
-		"cipher " + settings.Cipher,
+		"data-ciphers-fallback " + settings.Cipher,
+		"data-ciphers " + settings.Cipher,
 		"auth " + settings.Auth,
 	}
 	if !settings.Root {