Fix dependencies (#52)

Author: ssbarnea

setup.cfg

@@ -61,8 +61,10 @@ setup_requires =
 
 # These are required in actual runtime:
 install_requires =
-    molecule >= 3.2.0a0
-    pyyaml >= 5.1, < 6
+    # do not use ceiling unless you already know that newer version breaks
+    # do not use pre-release versions
+    molecule >= 3.2
+    pyyaml >= 5.1
     boto3; platform_system == "Windows"
 
 [options.extras_require]