Fix bad requirement syntax
@@ -23,7 +23,7 @@ requirements:
- python >=3.6
- attrs ==20.3.0
- backcall ==0.2.0
- - cachetools ==4.2.1;python_version~='3.5'
+ - cachetools ==4.2.1
- certifi ==2020.12.5
- cffi ==1.14.5
- chardet ==4.0.0
