Fetch user activity from GitHub using httpx & asyncio

[alysivji]

What does this do

• create AsyncGitHubClient that uses httpx and asyncio to fetch data asynchronously
• reduced surface area of old GitHubClient to the one function that is used
• removed a lot of unit tests for the GitHub Summary feature and replaced them with end-to-end tests that use vcr.py to replay requests made with httpx
  • not really happy with the way this feature was implemented, there are a lot of leaky abstractions which know too much information about other classes
• started to refactor the post_github_summary_message task by inlining each of the steps
  • again, not happy with the leaky abstractions; trying to make the data flow in a way that makes sense
• updated black

Why are we doing this

Part of #352

How should this be tested

• removed a lot of unit tests since we are in the middle of a refactor
• added end-to-end tests which show the feature works as expected

Migrations

n/a

Dependencies

n/a

Callouts

• ran a benchmark on my localhost... for 26 users, went from ~3-4 seconds to around 1.5 second

[codecov-commenter]

Codecov Report

Merging #355 (8a9c026) into master (1d2c06d) will decrease coverage by 0.15%. The diff coverage is 97.05%.

@@            Coverage Diff             @@
##           master     #355      +/-   ##
==========================================
- Coverage   89.67%   89.51%   -0.16%     
==========================================
  Files          71       71              
  Lines        2509     2509              
==========================================
- Hits         2250     2246       -4     
- Misses        259      263       +4     

Impacted Files	Coverage Δ
busy_beaver/app.py	86.15% <50.00%> (+0.21%)	:arrow_up:
...beaver/apps/github_integration/summary/workflow.py	95.45% <95.45%> (-1.10%)	:arrow_down:
busy_beaver/common/wrappers/github.py	97.24% <98.27%> (+1.83%)	:arrow_up:
...y_beaver/apps/github_integration/summary/blocks.py	100.00% <100.00%> (ø)
..._beaver/apps/github_integration/summary/summary.py	95.65% <100.00%> (-4.35%)	:arrow_down:
busy_beaver/clients.py	100.00% <100.00%> (ø)
busy_beaver/common/wrappers/__init__.py	100.00% <100.00%> (ø)
busy_beaver/toolbox/__init__.py	100.00% <100.00%> (ø)
busy_beaver/toolbox/helpers.py	93.75% <100.00%> (+1.44%)	:arrow_up:
busy_beaver/common/wrappers/requests_client.py	88.23% <0.00%> (-8.83%)	:arrow_down:
... and 2 more

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