Sdk v2 upgrade

[dev-codesymphony]

Sdk v2 upgrade

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@b23c2e4). Click here to learn what that means. Patch has no changes to coverable lines.

:exclamation: Current head df5a858 differs from pull request most recent head 2d5a537. Consider uploading reports for the commit 2d5a537 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #43 +/- ## ========================================= Coverage ? 92.05% ========================================= Files ? 6 Lines ? 277 Branches ? 52 ========================================= Hits ? 255 Misses ? 4 Partials ? 18 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None)

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[ngyongzhen]

Sample app should be moved to quick start repo. Readme.md should be updated as well.

Resolved

[imagekitio]

Sample app should be moved to quick start repo. Readme.md should be updated as well.

Resolved

Where is the corresponding PR in quickstart samples project?

[imagekitio]

We should restructure all test cases related code and put it inside tests folder as per React. We should not keep it in src folder.

Not resolved

[ngyongzhen]

We should restructure all test cases related code and put it inside tests folder as per React. We should not keep it in src folder.

Not resolved

I took out the tests from src and put them all into tests folder - what is the gap here?