Adding type annotation for the scoreboard method

[spkane31]

This PR adds a Team type annotation for the Matchup class. Currently, the id is written (as an int) and then in a loop it is dynamically changed to a Team. I made a change to store the id in a separate variable _{home,away}_team_id and then uses that variable in the loop to set the team. I noticed this 'issue' while working in VS Code and the type annotation wasn't populating, this should make for a slightly improved developer experience

[spkane31]

I tested this locally to confirm it does not contain any breaking changes to functionality, only adding a new member variable

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01% ⚠️

Comparison is base (81f8967) 80.36% compared to head (81d853a) 80.36%.
Report is 13 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #467      +/-   ##
==========================================
- Coverage   80.36%   80.36%   -0.01%     
==========================================
  Files          60       60              
  Lines        2109     2114       +5     
==========================================
+ Hits         1695     1699       +4     
- Misses        414      415       +1     

Files Changed	Coverage Δ
espn_api/football/league.py	94.52% <100.00%> (ø)
espn_api/football/matchup.py	94.11% <100.00%> (+1.26%)	⬆️

... and 1 file with indirect coverage changes

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[cwendt94]

Looks good, thanks for adding this!