Add support for brotli compression

[tanmoyopenroot]

Feat #5910

Checklist

• Includes tests
• Update documentation

Description of what you did:

Upgrade koa-compress and add support for Brotli compression

Default config

{
  "gzip": {
    "enabled": false,
    "options": {
      "br":  false
    }
  }
}

On add following config

{
  "gzip": {
    "enabled": true,
    "options": {
      "br":  true,
      "threshold": 2048
    }
  }
}

[codecov]

Codecov Report

Merging #8169 into master will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8169      +/-   ##
==========================================
+ Coverage   32.96%   33.03%   +0.06%     
==========================================
  Files        1197     1219      +22     
  Lines       13020    13562     +542     
  Branches     1286     1348      +62     
==========================================
+ Hits         4292     4480     +188     
- Misses       7885     8200     +315     
- Partials      843      882      +39     

Flag	Coverage Δ
#front	24.70% <ø> (-0.36%)	⬇️
#unit	54.10% <ø> (+0.21%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rapi-admin/admin/src/hooks/useFetchRole/reducer.js	80.00% <0.00%> (-20.00%)	⬇️
...min/admin/src/components/Roles/Permissions/init.js	80.00% <0.00%> (-20.00%)	⬇️
packages/strapi-admin/services/permission.js	77.57% <0.00%> (-14.00%)	⬇️
...in/src/containers/Users/ProtectedEditPage/index.js	87.50% <0.00%> (-12.50%)	⬇️
...t-type-builder/controllers/validation/relations.js	50.00% <0.00%> (-12.50%)	⬇️
.../admin/src/components/Roles/Permissions/reducer.js	85.41% <0.00%> (-12.15%)	⬇️
...ages/strapi/lib/services/entity-validator/index.js	54.11% <0.00%> (-9.78%)	⬇️
packages/strapi/lib/core-api/service.js	64.44% <0.00%> (-4.79%)	⬇️
.../admin/src/containers/Webhooks/EditView/reducer.js	82.35% <0.00%> (-4.32%)	⬇️
...admin/admin/src/containers/Roles/EditPage/index.js	55.17% <0.00%> (-4.09%)	⬇️
... and 106 more

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[alexandrebodin]

Thanks let's make it even better ;)