Fix for reading past end of file

RLS: v0.7.6

Fix for event loop handling in separate threads

Adds location_mode for GRS compatibility and ACL

Fix for exists()

Removed package constraints for azure-storage-blob, pytest, and docker

Compatibible with fsspec>=0.9

release 0.7.0

Allow connection_string with without account_name

Added ability to read environmental variables for instantiation of class