Update cookiecutter.json

{{cookiecutter.project_slug}}/src/{{cookiecutter.project_slug}}/__init__.py

 """ {{cookiecutter.project_name}} """
-
-try:
-    from importlib import metadata
-except ImportError:  # for Python<3.8
-    import importlib_metadata as metadata
-
-__version__ = metadata.version("{{cookiecutter.project_slug}}")