build(deps-dev): bump pytest-cov from 3.0.0 to 4.0.0 (#108)

Pipfile.lock

@@ -422,11 +422,11 @@
         },
         "pytest-cov": {
             "hashes": [
-                "sha256:578d5d15ac4a25e5f961c938b85a05b09fdaae9deef3bb6de9a6e766622ca7a6",
-                "sha256:e7f0f5b1617d2210a2cabc266dfe2f4c75a8d32fb89eafb7ad9d06f6d076d470"
+                "sha256:2feb1b751d66a8bd934e5edfa2e961d11309dc37b73b0eabe73b5945fee20f6b",
+                "sha256:996b79efde6433cdbd0088872dbc5fb3ed7fe1578b68cdbba634f14bb8dd0470"
             ],
             "index": "pypi",
-            "version": "==3.0.0"
+            "version": "==4.0.0"
         },
         "pytest-timeout": {
             "hashes": [