fix Unicode error on Windows when linting

[Zethson]

Signed-off-by: zethson lukas.heumos@posteo.net

Fixes #749

[Zethson]

@e2jk this should fix it, right? Would be happy if you have a minute to test it!

CI failing is due to #756 and not related.

[e2jk]

@Zethson yes that works.
(I have only tested the creation of the package, not the Docker part that you've also updated, but there should be no reason why it wouldn't work there)

Documenting what I've done:

• I've put back the version containing the emoticons in C:\Users\<username>\.local\pipx\venvs\cookietemple\Lib\site-packages\cookietemple\create\templates\common_files\{{cookiecutter.commonName}}\.github\release-drafter.yml
• I've run the cookietemple create and confirmed that the project creation crashes again with the same UnicodeDecodeError exception
• I've made the change to line 254 of cookietemple/lint/template_linter.py to explictly open the file as UTF-8 encoding
• Re-running cookietemple create the project is now properly created. SUCCESS!

As far as I'm concerned, you can merge this PR.

[Zethson]

Thank you very much!