[BUG] KeyError: 'tag_name'

[pandalanax]

Describe the bug
When executing savify it tries to fetch updates from https://api.github.com/repos/LaurenceRawlings/savify/releases/latest which in my case i was rate limited.

I guess i was rate limited because my script looked like this:

cat tracks_v1.txt | while read line 
do
    savify $line -g "%artist%/%album%" -q best -f mp3  -o ~/Desktop/music_v1
done

so the function check_for_updates() gets called for every single line in that text file.

Expected behavior
Do not check for updates when the command is issued. Instead let the user look for updates himself.

Screenshots

Script:

[INFO]  Checking for updates...
Traceback (most recent call last):
  File "spotify_downloader.py", line 16, in <module>
    s = Savify(api_credentials=api_creds,
  File "/home/oskar/.local/lib/python3.8/site-packages/savify/savify.py", line 80, in __init__
    self.check_for_updates()
  File "/home/oskar/.local/lib/python3.8/site-packages/savify/savify.py", line 84, in check_for_updates
    latest_ver = requests.get('https://api.github.com/repos/LaurenceRawlings/savify/releases/latest').json()[
KeyError: 'tag_name'

Response from https://api.github.com/repos/LaurenceRawlings/savify/releases/latest link:

{"message":"API rate limit exceeded for XXX.XXX.XXX.XXX. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)","documentation_url":"https://docs.github.com/rest/overview/resources-in-the-rest-api#rate-limiting"}

Desktop:

• OS: ubuntu
• Version [2.3.4

QUICK FIX
cloned the repo and uncomment line https://github.com/LaurenceRawlings/savify/blob/main/savify/savify.py#L80