Update Python dependencies

app.briar.gtk.json

@@ -54,8 +54,8 @@
             "sources": [
                 {
                     "type": "file",
-                    "url": "https://files.pythonhosted.org/packages/18/b0/8146a4f8dd402f60744fa380bc73ca47303cccf8b9190fd16a827281eac2/certifi-2019.9.11-py2.py3-none-any.whl",
-                    "sha256": "fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef"
+                    "url": "https://files.pythonhosted.org/packages/57/2b/26e37a4b034800c960a00c4e1b3d9ca5d7014e983e6e729e33ea2f36426c/certifi-2020.4.5.1-py2.py3-none-any.whl",
+                    "sha256": "1d987a998c75633c40847cc966fcf5904906c920a7f17ef374f5aa4282abd304"
                 },
                 {
                     "type": "file",
@@ -79,8 +79,8 @@
                 },
                 {
                     "type": "file",
-                    "url": "https://files.pythonhosted.org/packages/79/78/17e97a159dc55308b1468a638c7267f19765281f6205ec9c15253c154022/websockets-8.0.2.tar.gz",
-                    "sha256": "882a7266fa867a2ebb2c0baaa0f9159cabf131cf18c1b4270d79ad42f9208dc5"
+                    "url": "https://files.pythonhosted.org/packages/e9/2b/cf738670bb96eb25cb2caf5294e38a9dc3891a6bcd8e3a51770dbc517c65/websockets-8.1.tar.gz",
+                    "sha256": "5c65d2da8c6bce0fca2528f69f44b2f977e06954c8512a952222cea50dad430f"
                 }
             ]
         },