Allow older version of python for compatibility with production systems

atdb_csv_gen/setup.py

@@ -17,5 +17,5 @@ setup(
     scripts=["bin/atdb_csv_gen"],
     license="Apache License, Version 2.0",
     zip=False,
-    python_requires=">=3.7"
+    python_requires=">=3.6.8"
 )

atdb_inspect_transition/setup.py

@@ -17,5 +17,5 @@ setup(
     scripts=["bin/atdb_inspect_transition"],
     license="Apache License, Version 2.0",
     zip=False,
-    python_requires=">=3.7"
+    python_requires=">=3.6.8"
 )

atdb_result_gatherer/setup.py

@@ -17,5 +17,5 @@ setup(
     scripts=["bin/atdb_result_gatherer"],
     license="Apache License, Version 2.0",
     zip=False,
-    python_requires=">=3.7"
+    python_requires=">=3.6.8"
 )