removed fixed versions

setup.py

@@ -48,22 +48,18 @@
     package_dir={'': 'src'},
     include_package_data=True,
     zip_safe=False,
-    python_requires=">=3.4",
     install_requires=[
         'setuptools',
         # -*- Extra requirements: -*-
         'z3c.jbot',
-        'plone.api>=1.8.4',
+        'plone.api,
         'plone.restapi',
         'plone.app.dexterity',
     ],
     extras_require={
         'test': [
             'plone.app.testing',
-            # Plone KGS does not use this version, because it would break
-            # Remove if your package shall be part of coredev.
-            # plone_coredev tests as of 2016-04-01.
-            'plone.testing>=5.0.0',
+            'plone.testing,
             'plone.app.contenttypes',
             'plone.app.robotframework[debug]',
         ],