Feat: OneBot 12 支持发送 msgpack 编码数据

[he0119]

No description provided.

[codecov]

Codecov Report

Merging #56 (07394fd) into master (75d4f87) will decrease coverage by 0.13%.
The diff coverage is 47.61%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
- Coverage   70.24%   70.11%   -0.13%     
==========================================
  Files          22       22              
  Lines        1946     1961      +15     
==========================================
+ Hits         1367     1375       +8     
- Misses        579      586       +7     

Flag	Coverage Δ
unittests	70.11% <47.61%> (-0.13%)	⬇️

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Impacted Files	Coverage Δ
nonebot/adapters/onebot/v12/adapter.py	62.82% <9.09%> (-1.11%)	⬇️
nonebot/adapters/onebot/v12/utils.py	87.50% <85.71%> (-0.50%)	⬇️
nonebot/adapters/onebot/v12/config.py	100.00% <100.00%> (ø)

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[github-actions]

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