requirements.txt updated for python 3.4

Author: Arun S Kumar

requirements.txt

@@ -9,8 +9,8 @@ mongoengine==0.19.1; python_version < '3.4'
 mongoengine==0.20.0; python_version > '3.4'
 mongomock==3.21.0
 pymongo==3.11.0
-pytest==4.6.11; python_version < '3.0'
-pytest==6.1.2; python_version > '3.0'
+pytest==4.6.11; python_version < '3.4'
+pytest==6.1.2; python_version > '3.4'
 pytest-cov==2.10.1
 singledispatch==3.4.0.3
 # https://stackoverflow.com/a/58189684/9041712