rez platform_ broken with python3.8

[predat]

Summary

According to https://bugs.python.org/issue28167, 'platform.linux_distribution()' and ' platform.dist()' are remove in python 3.8.
https://github.com/nir0s/distro could be include in 'vendor' directrory and use 'distro.linux_distribution()'?

Info

Rez version: master efabf3e
Platform and operating system: Arch Linux
Simplest possible steps to reproduce:

rez-env

Traceback (most recent call last):
  File "/opt/rez/lib/python3.8/site-packages/rez/vendor/version/version.py", line 863, in __init__
    parser = _VersionRangeParser(range_str, make_token,
  File "/opt/rez/lib/python3.8/site-packages/rez/vendor/version/version.py", line 665, in __init__
    raise ParseException("Syntax error in version range '%s'" % part)
rez.vendor.version.util.ParseException: Syntax error in version range '=={system.os}'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/rez/bin/rez/rez-env", line 8, in <module>
    sys.exit(run_rez_env())
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/_entry_points.py", line 152, in run_rez_env
    return run("env")
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/_main.py", line 160, in run
    returncode = run_cmd()
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/_main.py", line 152, in run_cmd
    return func(opts, opts.parser, extra_arg_groups)
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/env.py", line 195, in command
    context = ResolvedContext(package_requests=request,
  File "/opt/rez/lib/python3.8/site-packages/rez/resolved_context.py", line 209, in __init__
    self.implicit_packages = [PackageRequest(x)
  File "/opt/rez/lib/python3.8/site-packages/rez/resolved_context.py", line 209, in <listcomp>
    self.implicit_packages = [PackageRequest(x)
  File "/opt/rez/lib/python3.8/site-packages/rez/utils/formatting.py", line 64, in __init__
    super(PackageRequest, self).__init__(s)
  File "/opt/rez/lib/python3.8/site-packages/rez/vendor/version/requirement.py", line 152, in __init__
    self.range_ = VersionRange(
  File "/opt/rez/lib/python3.8/site-packages/rez/vendor/version/version.py", line 867, in __init__
    raise VersionError("Syntax error in version range '%s': %s"
rez.vendor.version.util.VersionError: Syntax error in version range '=={system.os}': Syntax error in version range '=={system.os}'
[predat@homepc rez (master)]$ rez-bind os
searching /opt/rez/lib/python3.8/site-packages/rez/bind...
creating package 'os' in /home/predat/packages...
Traceback (most recent call last):
  File "/opt/rez/lib/python3.8/site-packages/rez/utils/platform_.py", line 271, in _os
    distributor_, release_, _ = platform.linux_distribution()
AttributeError: module 'platform' has no attribute 'linux_distribution'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/rez/bin/rez/rez-bind", line 8, in <module>
    sys.exit(run_rez_bind())
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/_entry_points.py", line 103, in run_rez_bind
    return run("bind")
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/_main.py", line 160, in run
    returncode = run_cmd()
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/_main.py", line 152, in run_cmd
    return func(opts, opts.parser, extra_arg_groups)
  File "/opt/rez/lib/python3.8/site-packages/rez/cli/bind.py", line 101, in command
    bind_package(name,
  File "/opt/rez/lib/python3.8/site-packages/rez/package_bind.py", line 110, in bind_package
    variants_ = _bind_package(name_,
  File "/opt/rez/lib/python3.8/site-packages/rez/package_bind.py", line 175, in _bind_package
    variants = bindfunc(path=install_path,
  File "/opt/rez/lib/python3.8/site-packages/rez/bind/os.py", line 12, in bind
    version = Version(system.os)
  File "/opt/rez/lib/python3.8/site-packages/rez/utils/data_utils.py", line 191, in __get__
    result = self.func(instance)
  File "/opt/rez/lib/python3.8/site-packages/rez/system.py", line 52, in os
    r = platform_.os
  File "/opt/rez/lib/python3.8/site-packages/rez/utils/data_utils.py", line 191, in __get__
    result = self.func(instance)
  File "/opt/rez/lib/python3.8/site-packages/rez/utils/platform_mapped.py", line 31, in inner
    result = func(*args, **kwargs)
  File "/opt/rez/lib/python3.8/site-packages/rez/utils/platform_.py", line 33, in os
    return self._os()
  File "/opt/rez/lib/python3.8/site-packages/rez/utils/platform_.py", line 273, in _os
    distributor_, release_, _ = platform.dist()
AttributeError: module 'platform' has no attribute 'dist'