Bugfix: explicit encoding type declaration

[JhomeWu]

Bugfix for: Issue #21 #23

From the Python 3 docs for open():

if encoding is not specified the encoding used is platform-dependent: locale.getencoding() is called to get the current locale encoding.

In Windows,it uses legacy encodings for the system encoding (the ANSI Code Page), that cause these issues.

Although it can be solved by two things that doen't need change anything

1. PEP 540 (Python3.7), Python add Add a new “UTF-8 Mode” , people can solve these issue via the -X utf8 command line option
2. just waiting for PEP 686 (Python 3.15) that Python will enable UTF-8 mode by default.

But I think user will be happy u to have these small to make it work without typing command option or waiting it solved

[juanparomero]

@JhomeWu I think the pull request is missing the new executables, don't you think?
(I couldn't build the executables)

[JhomeWu]

@juanparomero
Because github pull request is only for contributing to the source code.
The new executables will provide by maintainer after merging PR in release version page