Update tox environment

Bump version(s) of python as well as test environment dependencies

Change-Id: I50632d04d65559e5d24a308e1218b89636b18122

Author: Fredrik Fristedt

tox.ini

@@ -4,22 +4,22 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py36,black,docs,pylint,pydocstyle
+envlist = py311,black,docs,pylint,pydocstyle
 
 [testenv]
 deps =
-    pytest==7.0
-    pytest-cov==4.0.0
+    pytest==7.4.1
+    pytest-cov==4.1.0
     mongomock==4.1.2
 setenv = MONGODB_CONNSTRING = mongodb://localhost:27017
          MONGODB_DATABASE = testing_eiffel_graphql_api
 commands =
-    pytest -s --log-format="%(levelname)%: %(message)s" {posargs}
-basepython = python3.6
+    pytest -s --log-format="%(levelname)s: %(message)s" {posargs}
+basepython = python3.11.5
 
 [testenv:black]
 deps =
-    black==22.8.0
+    black==23.9.1
 commands =
     black --check --diff .
 
@@ -31,9 +31,9 @@ commands =
 
 [testenv:pylint]
 deps =
-    pylint==2.12.2
-    pytest==7.0
-    pytest-cov==4.0.0
+    pylint==2.17.5
+    pytest==7.4.1
+    pytest-cov==4.1.0
     mongomock==4.1.2
 commands =
     pylint src/eiffel_graphql_api tests