Not working with click 7.0.*

[hille721]

bits3 command is not worlink if click 7.0* is installed:

$ bits3 --help
Traceback (most recent call last):
  File "/home/hille/gitrepos/bits3/.venv/bin/bits3", line 11, in <module>
    load_entry_point('bits3', 'console_scripts', 'bits3')()
  File "/home/hille/gitrepos/bits3/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/home/hille/gitrepos/bits3/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 2852, in load_entry_point
    return ep.load()
  File "/home/hille/gitrepos/bits3/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 2443, in load
    return self.resolve()
  File "/home/hille/gitrepos/bits3/.venv/lib/python3.8/site-packages/pkg_resources/__init__.py", line 2449, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/home/hille/gitrepos/bits3/src/bits3/cli.py", line 26, in <module>
    def cli(backupdir, bucket, secret, uploadintervall,
  File "/home/hille/gitrepos/bits3/.venv/lib/python3.8/site-packages/click/decorators.py", line 173, in decorator
    _param_memo(f, OptionClass(param_decls, **option_attrs))
  File "/home/hille/gitrepos/bits3/.venv/lib/python3.8/site-packages/click/core.py", line 1601, in __init__
    raise TypeError('Got secondary option for non boolean flag.')
TypeError: Got secondary option for non boolean flag.

[hille721]

click version 6 is also not working, at least Click 8 is required