Python - Update workflow and Makefile with tests

bindings/python/Makefile

@@ -1,9 +1,13 @@
-.PHONY: style check-style
+.PHONY: style check-style test
 
 # Format source code automatically
-
 style:
 	black --line-length 100 --target-version py35 examples tokenizers tests
 
+# Check the source code is formatted correctly
 check-style:
 	black --check --line-length 100 --target-version py35 examples tokenizers tests
+
+# Launch the test suite
+test:
+	python -m pytest -s -v tests

bindings/python/setup.py

@@ -1,6 +1,9 @@
 from setuptools import setup
 from setuptools_rust import Binding, RustExtension
 
+extras = {}
+extras["testing"] = ["pytest"]
+
 setup(
     name="tokenizers",
     version="0.7.0-rc3",
@@ -13,6 +16,7 @@ setup(
     url="https://github.com/huggingface/tokenizers",
     license="Apache License 2.0",
     rust_extensions=[RustExtension("tokenizers.tokenizers", binding=Binding.PyO3)],
+    extras_require=extras,
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",