fix: middleware with ctx.body

[czy88840616]

Checklist

• npm test passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

Description of change

[gitpod-io]

[codecov-commenter]

Codecov Report

Merging #1389 (79b6979) into 3.x (e4595d3) will increase coverage by 0.02%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##              3.x    #1389      +/-   ##
==========================================
+ Coverage   81.68%   81.71%   +0.02%     
==========================================
  Files         301      301              
  Lines       10261    10285      +24     
  Branches     2246     2247       +1     
==========================================
+ Hits         8382     8404      +22     
- Misses       1714     1715       +1     
- Partials      165      166       +1     

Impacted Files	Coverage Δ
packages/core/src/baseFramework.ts	85.11% <66.66%> (-0.43%)	⬇️
packages/grpc/src/provider/framework.ts	92.15% <66.66%> (-0.08%)	⬇️
packages/rabbitmq/src/framework.ts	95.12% <75.00%> (-2.44%)	⬇️
packages/socketio/src/framework.ts	88.29% <80.00%> (-0.13%)	⬇️
packages/ws/src/framework.ts	91.08% <80.00%> (-0.09%)	⬇️
packages/core/src/service/middlewareService.ts	80.00% <100.00%> (+3.33%)	⬆️
packages/core/src/util/index.ts	90.08% <100.00%> (+0.89%)	⬆️
packages/faas/src/framework.ts	75.43% <100.00%> (+0.22%)	⬆️
packages/web-koa/src/framework.ts	66.21% <100.00%> (-0.46%)	⬇️
packages/web/src/framework/web.ts	87.50% <100.00%> (+1.13%)	⬆️
... and 3 more

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