Code style, PHP update and better testing

• Minimum requirement: PHP 7.4.0

Update BlackBonjour stdlib to 3.x

Merge pull request #4 from dpauli/#3-Update-BlackBanjour-stdlib

#3 Update BlackBonjour stdlib

Pin stdlib to 2.*

1.7.1

Pin stdlib on major version.

Update to stdlib 2.1.x

1.7.0

Update BlackBonjour/stdlib

Update to stdlib 2.0.x

1.6.0

Update to stdlib 2.0.x

Fix: Correct usage of folder name

#2 Fix correct usage of folder name.

Add EnumArgument

1.5.0

Add enum argument.

Allow Arguments with a bunch of Arguments

1.4.0

Extend with Arguments which has a bunch of Arguments.

New ArrayArgument class

With ArrayArgument you can add a real array of Arguments.

Correct Argument[] usage

The usage of Argument[] now creates the correct payload.