build(deps-dev): bump pylint-django from 2.0.14 to 2.0.15

Bumps [pylint-django](https://github.com/PyCQA/pylint-django) from 2.0.14 to 2.0.15.
- [Release notes](https://github.com/PyCQA/pylint-django/releases)
- [Changelog](https://github.com/PyCQA/pylint-django/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/PyCQA/pylint-django/compare/v2.0.14...v2.0.15)

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

Pipfile.lock

@@ -1040,11 +1040,11 @@
         },
         "pylint-django": {
             "hashes": [
-                "sha256:3a4cc19dd6301fc2d36c9fb6e15163001a6d12723c1f7f8c2249223c2a8c68f0",
+                "sha256:06a64331c498a3f049ba669dc0c174b92209e164198d43e589b1096ee616d5f8",
-                "sha256:c9bbcff6b87ee8466fae274fd7aae3d2d3d4c4d1ea20c48cbce673e837e36048"
+                "sha256:3d3436ba8d0fae576ae2db160e33a8f2746a101fda4463f2b3ff3a8b6fccec38"
             ],
             "index": "pypi",
-            "version": "==2.0.14"
+            "version": "==2.0.15"
         },
         "pylint-plugin-utils": {
             "hashes": [