fix: revert #784

[amondnet]

Describe the changes proposed in this Pull Request.

revert #784

According to the docs, the 2.0.7+2 seems to be working correctly.

mobxjs/mobx#3144

resolve #834
resolve #836
resolve #840

---

Pull Request Checklist

• If the changes are being made to code, ensure the version in pubspec.yaml is updated.
• Increment the major/minor/patch/patch-count, depending on the complexity of change
• Add the necessary unit tests to ensure the coverage does not drop
• Update the Changelog to include all changes made in this PR
• Run the set:versions command using npm or yarn. You can find this command in the package.json file in the root directory
• Include the necessary reviewers for the PR
• Update the docs if there are any API changes or additions to functionality

[netlify]

✅ Deploy Preview for mobx canceled.

Name	Link
🔨 Latest commit	a56f67f
🔍 Latest deploy log	https://app.netlify.com/sites/mobx/deploys/62c4e6fd7035b90009acc721

[codecov]

Codecov Report

Merging #842 (a56f67f) into master (c963f6c) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #842   +/-   ##
=======================================
  Coverage   98.65%   98.65%           
=======================================
  Files          56       56           
  Lines        1931     1933    +2     
=======================================
+ Hits         1905     1907    +2     
  Misses         26       26           

Flag	Coverage Δ
flutter_mobx	96.90% <ø> (ø)
mobx	98.32% <100.00%> (+<0.01%)	⬆️
mobx_codegen	100.00% <ø> (ø)

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

Impacted Files	Coverage Δ
mobx/lib/src/api/async/async_action.dart	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c963f6c...a56f67f. Read the comment docs.

[fzyzcjy]

LGTM given all discussions before

[HudsonAfonso]

@pavanpodila news?