Make setuptools version check less strict

Author: dolfinus

requirements.txt

@@ -1,11 +1,11 @@
 flake8>=3.8;python_version>="3.5"
-setuptools>=49.6;python_version>="3.5"
+setuptools;python_version>="3.5"
 flake8>=2.6,<3.0;python_version=='3.4'
 flake8>=2.6,<3.0;python_version=='3.3'
-setuptools==39.2 ;python_version=='3.4'
-setuptools==39.2 ;python_version=='3.3'
+setuptools<=39.2 ;python_version=='3.4'
+setuptools<=39.2 ;python_version=='3.3'
 typing>=3.6,<3.7;python_version=='3.4'
 typing>=3.6,<3.7;python_version=='3.3'
 flake8>=3.8;python_version<'3'
-setuptools>=44.1;python_version<"3"
+setuptools<=44.1;python_version<"3"
 typing>=3.7;python_version<"3"