fix: egg socket io missing session middleware

[czy88840616]

fix: #825

[gitpod-io]

[codecov-io]

Codecov Report

Merging #835 (346f510) into 2.x (11716fe) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              2.x     #835      +/-   ##
==========================================
+ Coverage   86.99%   87.02%   +0.02%     
==========================================
  Files         169      169              
  Lines        6722     6734      +12     
  Branches     1297     1300       +3     
==========================================
+ Hits         5848     5860      +12     
  Misses        843      843              
  Partials       31       31              

Impacted Files	Coverage Δ
packages/web/app.js	81.08% <100.00%> (+1.66%)	⬆️
packages/web/src/base.ts	91.71% <100.00%> (+0.50%)	⬆️

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