Fix devDependencies version duplication in monorepo

[vovsemenv]

This PR fix some problems with deps versions in monorepo
Linted via https://www.npmjs.com/package/sherif

  mobx git:(main) npx sherif --fix
✓ Select the version of @babel/core to use: ^7.16.0   ↑ highest
✓ Select the version of @babel/preset-env to use: ^7.16.4   ↑ highest

1 issue found in ./package.json:

 ⨯ error The root package.json should specify the package manager and version to use. Useful for tools like corepack. root-package-manager-field
  │ {
  +   "packageManager": "..."   ← missing packageManager field.
  │ }

1 issue found in ./packages/mobx/package.json:

 ✓ fixed package.json should not have empty dependencies fields. empty-dependencies
  │ {
  -   "dependencies": {}   ← field is empty.
  │ }

2 issues found in ./:

 ✓ fixed Dependency @babel/core has multiple versions defined in the workspace. multiple-dependency-versions
  ./packages
      mobx                      ^7.9.0   ↓ lowest
      mobx-undecorate           ^7.9.0   ↓ lowest
      eslint-plugin-mobx        ^7.16.0   ↑ highest

 ✓ fixed Dependency @babel/preset-env has multiple versions defined in the workspace. multiple-dependency-versions
  ./packages
      mobx                      ^7.9.5   ↓ lowest
      mobx-undecorate           ^7.9.5   ↓ lowest
      eslint-plugin-mobx        ^7.16.4   ↑ highest

4 issues found (1 ⨯, 0 ⚠️, 3 ✓) across 5 packages in 3.20526775s.
 Note: use `-i` to ignore dependencies, `-r` to ignore rules, `-p` to ignore packages, and `--fix` to autofix fixable issues.

Code change checklist

• Added/updated unit tests
• Updated /docs. For new functionality, at least API.md should be updated
• Verified that there is no significant performance drop (yarn mobx test:performance)

[changeset-bot]

⚠️ No Changeset found

Latest commit: a59ec22

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[mweststrate]

This PR seems to cause some failures.