build(deps): bump drf-yasg2 from 1.19.3 to 1.19.4 (#302)

Bumps [drf-yasg2](https://github.com/JoelLefkowitz/drf-yasg) from 1.19.3 to 1.19.4.
- [Release notes](https://github.com/JoelLefkowitz/drf-yasg/releases)
- [Changelog](https://github.com/JoelLefkowitz/drf-yasg/blob/master/docs/changelog.rst)
- [Commits](https://github.com/JoelLefkowitz/drf-yasg/compare/1.19.3...1.19.4)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Pipfile.lock

@@ -373,11 +373,11 @@
         },
         "drf-yasg2": {
             "hashes": [
-                "sha256:65826bf19e5222d38b84380468303c8c389d0b9e2335ee6efa4151ba87ca0a3f",
-                "sha256:6c662de6e0ffd4f74c49c06a88b8a9d1eb4bc9d7bfe82dac9f80a51a23cacecb"
+                "sha256:7037a8041eb5d1073fa504a284fc889685f93d0bfd008a963db1b366db786734",
+                "sha256:75e661ca5cf15eb44fcfab408c7b864f87c20794f564aa08b3a31817a857f19d"
             ],
             "index": "pypi",
-            "version": "==1.19.3"
+            "version": "==1.19.4"
         },
         "eight": {
             "hashes": [