[rp-reporter] Add tox

Related-Prod: PRODX-53429
Change-Id: I6dde28fe699211a6a193fdeff1e956be2b9a21db
diff --git a/rp_reporter/setup.py b/rp_reporter/setup.py
index bf43123..89441e5 100644
--- a/rp_reporter/setup.py
+++ b/rp_reporter/setup.py
@@ -5,7 +5,7 @@
     setup_requires=['pbr==5.6.0'],
     pbr=True,
     packages=find_packages(),
-    python_requires=">=3.9",
+    python_requires=">=3.8",
     entry_points={
         "console_scripts": [
             "rp-reporter=rp_reporter.batch_reporter:cli",