build(deps): bump channels from 3.0.2 to 3.0.3 (#437)

Bumps [channels](https://github.com/django/channels) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/django/channels/releases)
- [Changelog](https://github.com/django/channels/blob/master/CHANGELOG.txt)
- [Commits](https://github.com/django/channels/compare/3.0.2...3.0.3)

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

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

Pipfile.lock

@@ -82,10 +82,10 @@
         },
         "botocore": {
             "hashes": [
-                "sha256:7398c900dbd4e3d61647269215396ea3e8082f494f3e7b65d9b6aca049c1d463",
+                "sha256:4ff05bc089ba78a5996f06dcfddf8ca51583e30ce779ed95e9952e90c1907420",
-                "sha256:795a67338cadb0c3a45014a6c81659da6af623a4e973812f87a6f9d9fb7712e9"
+                "sha256:7725e08c95ae96c4dbd955cb4ae44a0c06d3e41f76a7feb0a941c27a44c63113"
             ],
-            "version": "==1.19.43"
+            "version": "==1.19.44"
         },
         "cachetools": {
             "hashes": [
@@ -152,11 +152,11 @@
         },
         "channels": {
             "hashes": [
-                "sha256:74db79c9eca616be69d38013b22083ab5d3f9ccda1ab5e69096b1bb7da2d9b18",
+                "sha256:056b72e51080a517a0f33a0a30003e03833b551d75394d6636c885d4edb8188f",
-                "sha256:f50a6e79757a64c1e45e95e144a2ac5f1e99ee44a0718ab182c501f5e5abd268"
+                "sha256:3f15bdd2138bb4796e76ea588a0a344b12a7964ea9b2e456f992fddb988a4317"
             ],
             "index": "pypi",
-            "version": "==3.0.2"
+            "version": "==3.0.3"
         },
         "channels-redis": {
             "hashes": [
@@ -899,10 +899,10 @@
         },
         "pytz": {
             "hashes": [
-                "sha256:3e6b7dd2d1e0a59084bcee14a17af60c5c562cdc16d828e8eba2e683d3a7e268",
+                "sha256:16962c5fb8db4a8f63a26646d8886e9d769b6c511543557bc84e9569fb9a9cb4",
-                "sha256:5c55e189b682d420be27c6995ba6edce0c0a77dd67bfbe2ae6607134d5851ffd"
+                "sha256:180befebb1927b16f6b57101720075a984c019ac16b1b7575673bea42c6c3da5"
             ],
-            "version": "==2020.4"
+            "version": "==2020.5"
         },
         "pyyaml": {
             "hashes": [
@@ -1607,10 +1607,10 @@
         },
         "pytz": {
             "hashes": [
-                "sha256:3e6b7dd2d1e0a59084bcee14a17af60c5c562cdc16d828e8eba2e683d3a7e268",
+                "sha256:16962c5fb8db4a8f63a26646d8886e9d769b6c511543557bc84e9569fb9a9cb4",
-                "sha256:5c55e189b682d420be27c6995ba6edce0c0a77dd67bfbe2ae6607134d5851ffd"
+                "sha256:180befebb1927b16f6b57101720075a984c019ac16b1b7575673bea42c6c3da5"
             ],
-            "version": "==2020.4"
+            "version": "==2020.5"
         },
         "pyyaml": {
             "hashes": [