Update Python dependencies

Author: mdmintz

requirements.txt

@@ -1,7 +1,7 @@
 pip>=20.2.2
 packaging>=20.4
 setuptools>=44.1.1;python_version<"3.5"
-setuptools>=50.2.0;python_version>="3.5"
+setuptools>=50.3.0;python_version>="3.5"
 setuptools-scm>=4.1.2
 wheel>=0.35.1
 six==1.15.0
@@ -19,7 +19,7 @@ more-itertools==5.0.0;python_version<"3.5"
 more-itertools==8.5.0;python_version>="3.5"
 cssselect==1.1.0
 pluggy==0.13.1
-attrs>=20.1.0
+attrs>=20.2.0
 py==1.8.1;python_version<"3.5"
 py==1.9.0;python_version>="3.5"
 pytest==4.6.11;python_version<"3.5"

setup.py

@@ -93,7 +93,7 @@
         'pip>=20.2.2',
         'packaging>=20.4',
         'setuptools>=44.1.1;python_version<"3.5"',
-        'setuptools>=50.2.0;python_version>="3.5"',
+        'setuptools>=50.3.0;python_version>="3.5"',
         'setuptools-scm',
         'wheel>=0.35.1',
         'six',
@@ -111,7 +111,7 @@
         'more-itertools==8.5.0;python_version>="3.5"',
         'cssselect==1.1.0',
         'pluggy==0.13.1',
-        'attrs>=20.1.0',
+        'attrs>=20.2.0',
         'py==1.8.1;python_version<"3.5"',
         'py==1.9.0;python_version>="3.5"',
         'pytest==4.6.11;python_version<"3.5"',