main/py3-bcrypt: fix bld by adding py3-wheel dependency

Build failing with error:

WARNING: The wheel package is not available.
  ERROR: Command errored out with exit status 1:
   command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-wheel-2al57nfo/cffi/setup.py'"'"'; __file__='"'"'/tmp/pip-wheel-2al57nfo/cffi/setup.py'"'"';f=getattr(tokenize
       cwd: /tmp/pip-wheel-2al57nfo/cffi/
  Complete output (6 lines):
  usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
     or: setup.py --help [cmd1 cmd2 ...]
     or: setup.py --help-commands
     or: setup.py cmd --help

  error: invalid command 'bdist_wheel'
  ----------------------------------------
  ERROR: Failed building wheel for cffi
ERROR: Failed to build one or more wheels
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/setuptools/installer.py", line 128, in fetch_build_egg
    subprocess.check_call(cmd)
  File "/usr/lib/python3.8/subprocess.py", line 364, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/usr/bin/python3', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmpb94t_e5g', '--quiet', 'cffi>=1.1']' returned non-zero exit status

Adding py3-wheel dependency will fix