Update GnuTLS version check

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

modules/misc/gnutls.c

@@ -146,7 +146,7 @@ static int gnutls_Init (vlc_object_t *p_this)
         goto error;
     }
 
-    const char *psz_version = gnutls_check_version ("1.3.3");
+    const char *psz_version = gnutls_check_version ("2.0.0");
     if (psz_version == NULL)
     {
         msg_Err (p_this, "unsupported GnuTLS version");