Separate requirements for python 3.8

Makefile

@@ -28,6 +28,8 @@ LINT_FILE_IGNORES = "$(LIB_NAME)/__init__.py:F401,F403 \
 # Python 3.7 uses a separate test requirements file
 ifeq ("$(VERSION_PYTHON)", "3.7")
  TEST_REQUIREMENTS = "tests_requirements_37.txt"
+else ifeq ("$(VERSION_PYTHON)", "3.8")
+ TEST_REQUIREMENTS = "tests_requirements_38.txt"
 else
  TEST_REQUIREMENTS = "tests_requirements.txt"
 endif

tests_requirements_38.txt

@@ -0,0 +1,27 @@
+# Test requirements specific to Python 3.8
+
+# Code quality tools:
+black==21.7b0
+codecov
+click==8.0.4
+flake8==4.0.1
+isort==5.10.1
+mypy<1.4.0 # Newer mypy versions cause issues with Python 3.8 ('Self' from 'typing_extensions').
+pytest
+pytest-cov
+pytest-random-order
+pytest-mock
+
+# For mypy stubs:
+types-Deprecated
+numpy
+
+tqdm
+
+# Notebook tests:
+jupytext
+nbformat
+nbconvert
+jupyter_client
+ipykernel
+tornado