Can't disable cloudflared

[felipeelias]

Running the command with

curxy --cloudflared false

Still runs the cloudflare tunnel.

I tracked down to this being a boolean argument

    cloudflared: {
      type: Boolean,
      default: true,
      description: "Use cloudflared to tunnel the server",
    },

I believe it's because the cleye does understand that passing a "false" value to a boolean actually means to disable the flag. Any value passed becomes truthy.

A possible solution is

    cloudflared: {
      type: String,
      default: "true",
      description: "Use cloudflared to tunnel the server",
    },

and then checking below for

flags.cloudflared === "true"

The downside is that this becomes a string, in the help we see

Flags:
      --cloudflared <string>           Use cloudflared to tunnel the server (default: "true")

Thoughts? I can make a PR with this fix