pyzmq version lock

[calgray]

pyzmq which is a dependency of zerorpc just released version 23.0.0 but contains breaking changes when running dlg daemon -vv with the following exception:

Traceback (most recent call last):
  File "/dlg/bin/dlg", line 8, in <module>
    sys.exit(run())
  File "/dlg/lib/python3.8/site-packages/dlg/common/tool.py", line 166, in run
    commands[cmd][1](sys.argv[1:])
  File "/dlg/lib/python3.8/site-packages/dlg/common/tool.py", line 106, in wrapped
    f(parser, *args, **kwargs)
  File "/dlg/lib/python3.8/site-packages/dlg/common/tool.py", line 100, in __call__
    return getattr(module, fname)(*args, **kwargs)
  File "/dlg/lib/python3.8/site-packages/dlg/manager/proc_daemon.py", line 392, in run_with_cmdline
    daemon = DlgDaemon(opts.master, opts.noNM, opts.noZC, opts.verbose - opts.quiet)
  File "/dlg/lib/python3.8/site-packages/dlg/manager/proc_daemon.py", line 107, in __init__
    self.startNM()
  File "/dlg/lib/python3.8/site-packages/dlg/manager/proc_daemon.py", line 179, in startNM
    logger.info("Starting Node Drop Manager with args: %s" % (" ".join(args)))
  File "/usr/lib/python3.8/logging/__init__.py", line 1446, in info
    self._log(INFO, msg, args, **kwargs)
  File "/usr/lib/python3.8/logging/__init__.py", line 1587, in _log
    record = self.makeRecord(self.name, level, fn, lno, msg, args,
  File "/dlg/lib/python3.8/site-packages/dlg/runtime/__init__.py", line 51, in makeRecord
    from ..manager import session
  File "/dlg/lib/python3.8/site-packages/dlg/manager/session.py", line 41, in <module>
    from .. import rpc
  File "/dlg/lib/python3.8/site-packages/dlg/rpc.py", line 35, in <module>
    import zerorpc
  File "/dlg/lib/python3.8/site-packages/zerorpc/__init__.py", line 33, in <module>
    from .core import *
  File "/dlg/lib/python3.8/site-packages/zerorpc/core.py", line 314, in <module>
    class Pusher(SocketBase):
  File "/dlg/lib/python3.8/site-packages/zerorpc/core.py", line 316, in Pusher
    def __init__(self, context=None, zmq_socket=zmq.PUSH):
AttributeError: module 'zerorpc.gevent_zmq' has no attribute 'PUSH'

Ideally zerorpc needs a minor update to depend on pyzmq~=22.3.0 but until then we can specify it for daliuge

[coveralls]

Coverage remained the same at 81.001% when pulling f875158 on pyzmq-lock into 833f61b on master.