fix code coverage

[cenfun]

Fixed code coverage report for node test runner with mcr

NOTE:
Please help to Adding the Codecov token for reporting coverage to Codecov. @jonathanong

Following reports will be generated after running npm run test:coverage

• console-details

[MCR] Koa Coverage Report
┌────────────────────┬──────────┬────────────┬──────────┬───────────┬──────────┬─────────────────┐
│ Name               │    Bytes │ Statements │ Branches │ Functions │    Lines │ Uncovered Lines │
├────────────────────┼──────────┼────────────┼──────────┼───────────┼──────────┼─────────────────┤
│ lib                │          │            │          │           │          │                 │
│ ├ application.js   │  99.81 % │   100.00 % │  97.67 % │  100.00 % │  99.38 % │ 239             │
│ ├ context.js       │  99.11 % │   100.00 % │  63.33 % │  100.00 % │  97.58 % │ 141-143         │
│ ├ only.js          │ 100.00 % │   100.00 % │ 100.00 % │  100.00 % │ 100.00 % │                 │
│ ├ request.js       │ 100.00 % │   100.00 % │  70.24 % │  100.00 % │ 100.00 % │                 │
│ ├ response.js      │ 100.00 % │   100.00 % │  57.60 % │  100.00 % │ 100.00 % │                 │
│ └ search-params.js │ 100.00 % │   100.00 % │ 100.00 % │  100.00 % │ 100.00 % │                 │
├────────────────────┼──────────┼────────────┼──────────┼───────────┼──────────┼─────────────────┤
│ Summary            │  99.85 % │   100.00 % │  72.84 % │  100.00 % │  99.57 % │                 │
└────────────────────┴──────────┴────────────┴──────────┴───────────┴──────────┴─────────────────┘

• v8
  see html report coverage-reports/index.html
• v8-json
  review file coverage with VScode extension directly.
• codecov
  generate native Codecov coverage data file (will upload to Codecov)

see coverage config mcr.config.js

Checklist

• I have ensured my pull request is not behind the main or master branch of the original repository.
• I have rebased all commits where necessary so that reviewing this pull request can be done without having to merge it first.
• I have written a commit message that passes commitlint linting.
• I have ensured that my code changes pass linting tests.
• I have ensured that my code changes pass unit tests.
• I have described my pull request and the reasons for code changes along with context if necessary.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.56%. Comparing base (b89e19a) to head (8bebae3).
Report is 22 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1847      +/-   ##
==========================================
- Coverage   99.61%   99.56%   -0.05%     
==========================================
  Files           5        6       +1     
  Lines         520      928     +408     
  Branches      147        2     -145     
==========================================
+ Hits          518      924     +406     
  Misses          2        2              
- Partials        0        2       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.