Introduce Code Coverage

[MunifTanjim]

Ref: #418

[MunifTanjim]

@cseickel can you please login to https://codecov.io and allow it to access this repository?

[cseickel]

@cseickel can you please login to https://codecov.io and allow it to access this repository?

Done. I added the upload token to the repo as CODECOV_TOKEN if you need it.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@5e9a08b). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #419   +/-   ##
=======================================
  Coverage        ?   52.96%           
=======================================
  Files           ?       48           
  Lines           ?     5405           
  Branches        ?        0           
=======================================
  Hits            ?     2863           
  Misses          ?     2542           
  Partials        ?        0           

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[MunifTanjim]

Done. I added the upload token to the repo as CODECOV_TOKEN if you need it.

Awesome! I don't think CODECOV_TOKEN is necessary of public repos.

Anyway, it's working. After this is merged, it should post coverage report on every PR.

[cseickel]

Nice! Thanks!