update codecov uploader to start getting coverage reports

[JessicaS11]

At some point we stopped getting code testing coverage reports (it was failing silently in Travis CI). This PR updates to use the most recent uploader. Addresses #485.

References:

• https://docs.codecov.com/docs/codecov-uploader#integrity-checking-the-uploader

[github-actions]

👈 Launch a binder notebook on this branch for commit 9b45e9f

I will automatically update this comment whenever this PR is modified

[codecov]

Codecov Report

Attention: 254 lines in your changes are missing coverage. Please review.

Comparison is base (d9a9d94) 59.09% compared to head (9b45e9f) 66.09%.
Report is 44 commits behind head on development.

Files	Patch %	Lines
icepyx/core/read.py	26.59%	68 Missing and 1 partial ⚠️
icepyx/core/is2ref.py	32.72%	37 Missing ⚠️
icepyx/core/variables.py	26.82%	30 Missing ⚠️
icepyx/quest/dataset_scripts/argo.py	79.59%	22 Missing and 8 partials ⚠️
icepyx/quest/quest.py	49.09%	28 Missing ⚠️
icepyx/core/query.py	69.23%	13 Missing and 7 partials ⚠️
icepyx/core/auth.py	76.74%	7 Missing and 3 partials ⚠️
icepyx/core/temporal.py	91.30%	4 Missing and 4 partials ⚠️
icepyx/core/granules.py	22.22%	6 Missing and 1 partial ⚠️
icepyx/tests/test_behind_NSIDC_API_login.py	0.00%	7 Missing ⚠️
... and 4 more

Additional details and impacted files

@@               Coverage Diff               @@
##           development     #496      +/-   ##
===============================================
+ Coverage        59.09%   66.09%   +7.00%     
===============================================
  Files               30       36       +6     
  Lines             2264     3115     +851     
  Branches           488      552      +64     
===============================================
+ Hits              1338     2059     +721     
- Misses             843      963     +120     
- Partials            83       93      +10     

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[weiji14]

Sorry for the late reply, was away for a few days. I see that the code is copied from the official instructions at https://docs.codecov.com/docs/codecov-uploader#integrity-checking-the-uploader, and the Codecov bot commented above, so should be all good!