Flag package description as Markdown

Author: anapaulagomes

setup.py

@@ -20,6 +20,7 @@ def read(fname):
     url="https://github.com/anapaulagomes/pytest-picked",
     description="Run the tests related to the changed files",
     long_description=read("README.rst"),
+    long_description_content_type="text/markdown",
     packages=find_packages(exclude=["tests", "docs"]),
     python_requires=">=3.7",
     install_requires=["pytest>=3.7.0"],