build(deps-dev): bump pytest from 5.4.3 to 6.1.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 to 6.1.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.4.3...6.1.2)

Signed-off-by: dependabot[bot] <support@github.com>

Pipfile.lock

@@ -124,6 +124,13 @@
             "index": "pypi",
             "version": "==1.6.1"
         },
+        "iniconfig": {
+            "hashes": [
+                "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3",
+                "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"
+            ],
+            "version": "==1.1.1"
+        },
         "isort": {
             "hashes": [
                 "sha256:54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1",
@@ -164,13 +171,6 @@
             ],
             "version": "==0.6.1"
         },
-        "more-itertools": {
-            "hashes": [
-                "sha256:8e1a2a43b2f2727425f2b5839587ae37093f19153dc26c0927d1048ff6557330",
-                "sha256:b3a9005928e5bed54076e6e549c792b306fddfe72b2d1d22dd63d42d5d3899cf"
-            ],
-            "version": "==8.6.0"
-        },
         "mypy": {
             "hashes": [
                 "sha256:00cb1964a7476e871d6108341ac9c1a857d6bd20bf5877f4773ac5e9d92cd3cd",
@@ -260,11 +260,11 @@
         },
         "pytest": {
             "hashes": [
-                "sha256:5c0db86b698e8f170ba4582a492248919255fcd4c79b1ee64ace34301fb589a1",
-                "sha256:7979331bfcba207414f5e1263b5a0f8f521d0f457318836a7355531ed1a4c7d8"
+                "sha256:4288fed0d9153d9646bfcdf0c0428197dba1ecb27a33bb6e031d002fa88653fe",
+                "sha256:c0a7e94a8cdbc5422a51ccdad8e6f1024795939cc89159a0ae7f0b316ad3823e"
             ],
             "index": "pypi",
-            "version": "==5.4.3"
+            "version": "==6.1.2"
         },
         "pytest-cov": {
             "hashes": [
@@ -380,13 +380,6 @@
             ],
             "version": "==3.7.4.3"
         },
-        "wcwidth": {
-            "hashes": [
-                "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784",
-                "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"
-            ],
-            "version": "==0.2.5"
-        },
         "wrapt": {
             "hashes": [
                 "sha256:b62ffa81fb85f4332a4f609cab4ac40709470da05643a082ec1eb88e6d9b97d7"