Bump django from 2.2.2 to 2.2.3

Bumps [django](https://github.com/django/django) from 2.2.2 to 2.2.3.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/2.2.2...2.2.3)
Signed-off-by: dependabot[bot] <support@github.com>

Pipfile.lock

@@ -18,10 +18,10 @@
     "default": {
         "certifi": {
             "hashes": [
-                "sha256:59b7658e26ca9c7339e00f8f4636cdfe59d34fa37b9b04f6f9e9926b3cece1a5",
-                "sha256:b26104d6835d1f5e49452a26eb2ff87fe7090b89dfcaee5ea2212697e1e1d7ae"
+                "sha256:046832c04d4e752f37383b628bc601a7ea7211496b4638f6514d0e5b9acc4939",
+                "sha256:945e3ba63a0b9f577b1395204e13c3a231f9bc0223888be653286534e5873695"
             ],
-            "version": "==2019.3.9"
+            "version": "==2019.6.16"
         },
         "chardet": {
             "hashes": [
@@ -32,11 +32,11 @@
         },
         "django": {
             "hashes": [
-                "sha256:753d30d3eb078064d2ddadfea65083c9848074a7f93d7b4dc7fa6b1380d278f5",
-                "sha256:7cb67e8b934fab23b6daed7144da52e8a25a47eba7f360ca43d2b448506b01ad"
+                "sha256:4d23f61b26892bac785f07401bc38cbf8fa4cec993f400e9cd9ddf28fd51c0ea",
+                "sha256:6e974d4b57e3b29e4882b244d40171d6a75202ab8d2402b8e8adbd182e25cf0c"
             ],
             "index": "pypi",
-            "version": "==2.2.2"
+            "version": "==2.2.3"
         },
         "django-ace": {
             "hashes": [