Cannot import xtuml module

[leviathan747]

When importing the 'xtuml' module, the 'tools' module gets imported and there is an exception in the import of that module related to the 'collections.abc' module:

To Reproduce
Steps to reproduce the behavior:

1. Create a script "test.py" containing a single line "import xtuml"
2. Run the script: python test.py
3. See the following output:

Traceback (most recent call last):
  File "/Users/levi/git/plus2json/test2.py", line 1, in <module>
    import xtuml
  File "/Users/levi/.pyenv/versions/3.10.10/lib/python3.10/site-packages/xtuml/__init__.py", line 24, in <module>
    from .tools import IdGenerator
  File "/Users/levi/.pyenv/versions/3.10.10/lib/python3.10/site-packages/xtuml/tools.py", line 131, in <module>
    class OrderedSet(collectionsAbc.MutableSet):
AttributeError: module 'collections' has no attribute 'MutableSet'

Environment (please complete the following information):

• OS: macOS Ventura
• Python version: 3.10.10
• pyxtuml version: 2.3.1

Additional context
I found this python issue: https://bugs.python.org/issue45776.

The problem is that in tools.py, the "collections.abc" module is not being explicitly imported.