Try fsspec 2021.7 (see zarr-developers#802)

joshmoore · joshmoore · commit 68adca50b624 · 2021-08-17T14:07:53.000+02:00
diff --git a/requirements_dev_optional.txt b/requirements_dev_optional.txt
@@ -17,6 +17,5 @@ flake8==3.9.2
 pytest-cov==2.12.1
 pytest-doctestplus==0.10.1
 h5py==3.3.0
-s3fs==2021.6.0
-fsspec==2021.6.0
+fsspec==2021.7.0
 moto[server]>=1.3.14
