Project author name cause UnicodeEncodeError while writing package on Windows

[davidlatwe]

Invoking custom build system...
Running build command: python C:\Users\david\dev\rez-packages\Qt.rez/rezbuild.py install
Traceback (most recent call last):
  File "C:\Python36_64\Lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Python36_64\Lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\david\rez\core\Scripts\rez\rez-build.exe\__main__.py", line 7, in <module>
  File "c:\users\david\rez\core\lib\site-packages\rez\cli\_entry_points.py", line 110, in run_rez_build
    return run("build")
  File "c:\users\david\rez\core\lib\site-packages\rez\cli\_main.py", line 160, in run
    returncode = run_cmd()
  File "c:\users\david\rez\core\lib\site-packages\rez\cli\_main.py", line 152, in run_cmd
    return func(opts, opts.parser, extra_arg_groups)
  File "c:\users\david\rez\core\lib\site-packages\rez\cli\build.py", line 157, in command
    variants=opts.variants)
  File "c:\users\david\rez\core\lib\site-packages\rezplugins\build_process\local.py", line 53, in build
    install=install)
  File "c:\users\david\rez\core\lib\site-packages\rez\build_process.py", line 204, in visit_variants
    result = func(variant, **kwargs)
  File "c:\users\david\rez\core\lib\site-packages\rezplugins\build_process\local.py", line 359, in _build_variant
    variant.install(install_path)
  File "c:\users\david\rez\core\lib\site-packages\rez\packages.py", line 449, in install
    overrides=overrides)
  File "c:\users\david\rez\core\lib\site-packages\rezplugins\package_repository\filesystem.py", line 722, in install_variant
    variant = _create_variant()
  File "c:\users\david\rez\core\lib\site-packages\rezplugins\package_repository\filesystem.py", line 715, in _create_variant
    overrides=overrides
  File "c:\users\david\rez\core\lib\site-packages\rezplugins\package_repository\filesystem.py", line 1190, in _create_variant
    dump_package_data(package_data, buf=f, format_=package_format)
  File "C:\Python36_64\Lib\contextlib.py", line 88, in __exit__
    next(self.gen)
  File "c:\users\david\rez\core\lib\site-packages\rez\serialise.py", line 89, in open_file_for_write
    f.write(content)
UnicodeEncodeError: 'cp950' codec can't encode character '\xf6' in position 620: illegal multibyte sequence

This require change in Rez, by adding kwarg encoding="utf-8" into following file open call resolved the problem :

https://github.com/nerdvegas/rez/blob/def201aca819862470b879d5beb75fcf3d46f87f/src/rez/serialise.py#L71-L72

https://github.com/nerdvegas/rez/blob/def201aca819862470b879d5beb75fcf3d46f87f/src/rez/serialise.py#L88-L89

[davidlatwe]

Fixed in AcademySoftwareFoundation/rez#928, release version 2.64.0