Added ssl context options

SSL context options can now be provided when using a bolt connection. An example of this can be found here:

$client = ClientBuilder::create()
    ->addBoltConnection('main', 'my-bolt-connection@somewhereinthecloud', BoltInjections::create()->withSslContextOptions([ 
          'verify_peer' => true,
          'allow_self_signed' => true
    ])
    ->build();