Relax version requiremets (#24)

* [AIRFLOW-2731] Raise psutil restriction to <6.0.0

* [TWTR][AIRFLOW-5925] Relax funcsigs requirement, open source PR hasnt landed yet

Author: aoen

airflow/version.py

@@ -18,4 +18,4 @@
 # under the License.
 #
 
-version = '1.10.0+twtr22'
+version = '1.10.0+twtr23'

setup.py

@@ -280,7 +280,7 @@ def do_setup():
             'flask-login>=0.3, <0.5',
             'flask-swagger==0.2.13',
             'flask-wtf>=0.14.2, <0.15',
-            'funcsigs==1.0.0',
+            'funcsigs>=1.0.0, <2.0.0',
             'future>=0.16.0, <0.17',
             'gitpython>=2.0.2',
             'gunicorn>=19.4.0, <20.0',
@@ -290,7 +290,7 @@ def do_setup():
             'markdown>=2.5.2, <3.0',
             'pandas>=0.17.1, <1.0.0',
             'pendulum==1.4.4',
-            'psutil>=4.2.0, <5.0.0',
+            'psutil>=4.2.0, <6.0.0',
             'pygments>=2.0.1, <3.0',
             'python-daemon>=2.1.1, <2.2',
             'python-dateutil>=2.3, <3',