Updated information on third-party-licenses

Author: AHartmaier

THIRD_PARTY_LICENSES

@@ -1,5 +1,7 @@
 This project makes use of the following third-party Python libraries:
 
+Runtime / build dependencies
+----------------------------
 - NumPy  
   License: BSD 3-Clause License  
   URL: https://numpy.org  
@@ -25,8 +27,27 @@ This project makes use of the following third-party Python libraries:
   URL: https://github.com/matplotlib/ipympl  
   License text: https://github.com/matplotlib/ipympl/blob/main/LICENSE
 
----
+Test / dev (not distributed with pyLabDD wheels)
+-----------------------------------------------
+- pytest
+  License: MIT License
+  Project: https://pytest.org
+  License text: https://docs.pytest.org/en/stable/license.html
 
+- black
+  License: MIT License
+  Project: https://github.com/psf/black
+
+- build
+  License: MIT License
+  Project: https://pypi.org/project/build/
+
+- twine
+  License: Apache License 2.0
+  Project: https://pypi.org/project/twine/
+
+Notes
+-----
 These libraries are **not distributed with pyLabFEA**. They are installed
-separately via PyPI or conda and include their own license information.
+separately via PyPI or conda(-forge) and include their own license information.
 This file is provided for the convenience of users.