🚀 Add mTLS and fix deprecation in TLS config

[ltns35]

Is your feature request related to a problem?
Yes, when starting the app with ListenTLS it has the following default configuration where PreferServerCipherSuites is deprecated by the Go team.

config := &tls.Config{
			MinVersion:   tls.VersionTLS12,
			PreferServerCipherSuites: true, // deprecated and ignored
			Certificates: []tls.Certificate{
				cert,
			},
		}

It could be interesting to allow mTLS in the configuration because many times we have to use certificate authorization for our microservices.

Describe the solution you'd like
We should update the MinVersion to TLS13, remove PreferServerCipherSuites because is deprecated and allow to add the CA.

config := &tls.Config{
			MinVersion:  tls.VersionTLS13, // changed to TLS13
			Certificates: []tls.Certificate{
				cert,
			},
                        ClientCAs:    caCertPool,
			ClientAuth:   tls.RequireAndVerifyClientCert
		}

Describe alternatives you've considered
Maybe adding the CA for mTSL could be done with another function called ListenWithMutualTLS.

Additional context
Go version: 1.17.5
Fiber version: 2.24.0

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