Roslibpy

----------

**Added**

* Added a ROS2-compatible header class in ``roslibpy.ros2.Header``.

**Changed**

**Fixed**

**Deprecated**

**Removed**

----------

**Added**

* Added authentication functionality described in [rosauth](http://wiki.ros.org/rosauth).

**Changed**

**Fixed**

**Deprecated**

**Removed**

----------

**Added**

* Added a wait event to close on IronPython to ensure the close request is sent before returning.

**Changed**

**Fixed**

* Fixed reconnection behavior on IronPython which would trigger reconnects even after a manual disconnect.

**Deprecated**

**Removed**

----------

**Added**

**Changed**

* Added ``tls`` to the twisted requirement (111).

**Fixed**

**Deprecated**

**Removed**

----------

**Added**

**Changed**

**Fixed**

* Fixed bug with action client/server and now they work as expected.
* Fixed Python 2.7 incompatibilities introduced in 1.4.0.

**Deprecated**

**Removed**

----------

**Added**

**Changed**

* Switched to ``black`` for python code formatting.
* Fix incompatible settings between ``black`` and ``flake8``.
* Updated Github Actions workflows to remove python 3.6 builds.
* Replaced occurrences of ``raise Exception`` with more specific ``Exception`` subclasses.

**Fixed**

**Deprecated**

**Removed**