Support GitHub authorization token to bypass the unauthorized requests limit

[teppyboy]

Is your feature request related to a problem? Please describe.
Continued from #95 (comment), tldr it's mostly useful for development & some rare cases (multiple application using GitHub API running, etc..) only.

Describe the solution you'd like
Support for an environment variable called PROTONUP_GITHUB_AUTHORIZATION_TOKEN, and read token from that variable.

Do not use arguments like --gh-auth-token because ps can read process arguments.

Describe alternatives you've considered
VPN to bypass, but using VPN is not really the right way to do.

Additional context
I can create a PR if you want :P

[teppyboy]

bump xD

[DavidoTek]

We could define a requests.Session and set the headers:

s = requests.Session()
token = os.getenv('PROTONUP_GITHUB_AUTHORIZATION_TOKEN')
if token:
    s.headers.update({'Authorization': f'token {token}'})
###
s.get(url='', stream=False)

[teppyboy]

yep probably like that, but since requests.get is being used everywhere that means we have to refactor our code to use session from requests.Session()

[DavidoTek]

Should work now, feel free to do some testing!

[teppyboy]

Sorry for late response, and yep it works flawlessly :P

[DavidoTek]

No problem, good to hear!