Bump attrs from 19.3.0 to 20.1.0

Bumps [attrs](https://github.com/python-attrs/attrs) from 19.3.0 to 20.1.0.
- [Release notes](https://github.com/python-attrs/attrs/releases)
- [Changelog](https://github.com/python-attrs/attrs/blob/master/CHANGELOG.rst)
- [Commits](python-attrs/attrs@19.3.0...20.1.0)

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

requirements/all.txt

@@ -30,9 +30,9 @@ async-timeout==3.0.1 \
     --hash=sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f \
     --hash=sha256:4291ca197d287d274d0b6cb5d6f8f8f82d434ed288f962539ff18cc9012f9ea3 \
     # via aiohttp, taskcluster
-attrs==19.3.0 \
-    --hash=sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c \
-    --hash=sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72 \
+attrs==20.1.0 \
+    --hash=sha256:2867b7b9f8326499ab5b0e2d12801fa5c98842d2cbd22b35112ae04bf85b4dff \
+    --hash=sha256:0ef97238856430dcf9228e07f316aefc17e8939fc8507e18c6501b761ef1a42a \
     # via aiohttp, black, jsonschema, pytest
 atomicwrites==1.4.0 \
     --hash=sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197 \

requirements/console-dev.txt

@@ -30,9 +30,9 @@ async-timeout==3.0.1 \
     --hash=sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f \
     --hash=sha256:4291ca197d287d274d0b6cb5d6f8f8f82d434ed288f962539ff18cc9012f9ea3 \
     # via aiohttp, taskcluster
-attrs==19.3.0 \
-    --hash=sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c \
-    --hash=sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72 \
+attrs==20.1.0 \
+    --hash=sha256:2867b7b9f8326499ab5b0e2d12801fa5c98842d2cbd22b35112ae04bf85b4dff \
+    --hash=sha256:0ef97238856430dcf9228e07f316aefc17e8939fc8507e18c6501b761ef1a42a \
     # via aiohttp, jsonschema, pytest
 beautifulsoup4==4.9.1 \
     --hash=sha256:73cc4d115b96f79c7d77c1c7f7a0a8d4c57860d1041df407dd1aae7f07a77fd7 \