feat: change `google-cloud-storage` dependency to versions >=1.41 and <3.0
Previously only supported versions <2.0, but the only breaking change in
version 2.0 of the google-cloud-storage
package is the removal of Python 2
support. As geddit
doesn't support Python 2, it's safe to permit
google-cloud-storage
versions <3.0 instead of <2.0.
Closes #10