Fixes #90

[SutubraResearch]

This is a response to a flagged issue: #90

[SutubraResearch]

Output of the test suite:

90 passed, 3 skipped, 4 warnings in 10.07s:

==================================================================================================================================================================== warnings summary =====================================================================================================================================================================
../.venv/lib/python3.12/site-packages/iam_units/init.py:24
/Users/cameronwade/PycharmProjects/temoa-SRfork/.venv/lib/python3.12/site-packages/iam_units/init.py:24: DeprecationWarning: configure_currency("EXC", "2005") will no longer be the default in some future version of iam-units. Code that relies on multiple-currency conversions should be updated to call this function explicitly.
warn(

../.venv/lib/python3.12/site-packages/gravis/_internal/plotting/template_system.py:5
/Users/cameronwade/PycharmProjects/temoa-SRfork/.venv/lib/python3.12/site-packages/gravis/_internal/plotting/template_system.py:5: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources as _pkg_resources

../.venv/lib/python3.12/site-packages/pkg_resources/init.py:3149
../.venv/lib/python3.12/site-packages/pkg_resources/init.py:3149
/Users/cameronwade/PycharmProjects/temoa-SRfork/.venv/lib/python3.12/site-packages/pkg_resources/init.py:3149: DeprecationWarning: Deprecated call to pkg_resources.declare_namespace('sphinxcontrib').
Implementing implicit namespace packages (as specified in PEP 420) is preferred to pkg_resources.declare_namespace. See https://setuptools.pypa.io/en/latest/references/keywords.html#keyword-namespace-packages
declare_namespace(pkg)

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
======================================================================================================================================================= 90 passed, 3 skipped, 4 warnings in 10.07s ========================================================================================================================================================