message: docs(migrate-7): add requirements note about mongoose version
diff: @@ -12,7 +12,8 @@ This Guide is written for migration from version `6.5.0` to `7.0.0`, for version
  ## Requirements changed
  - Nodejs 8 & 9 are now unsupported, lowest supported version is now `10.15`
  -- Typescript 3.8 is now required
  +- Typescript `3.8` is now required (`4.9` is recommended)
  +- Mongoose `5.9.10` or higher is now required
  ## Deprecation removals
  