Feature/replace bundling and testing stacks

[Howard86]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Update test runner with jest, bundling cli with tsup

• What is the current behavior? (You can also link to an open issue here)

Test runner contains quite a lot of tools including nyc, ava, sinon
Build relies on tsc which does the trans-piling without tree-shaking options

Reference:

• https://bundlephobia.com/package/next-api-handler@0.4.5

• What is the new behavior (if this is a feature change)?

Faster testing, bundling speed & smaller bundling size

• Other information:

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated
next-api-handler	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 15, 2023 at 7:09PM (UTC)

[codeclimate]

Code Climate has analyzed commit 8f92974 and detected 4 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Duplication	4

View more on Code Climate.

[cypress]

Passing run #130 ↗︎

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10

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Details:

null
Project: next-api-handler	Commit: 01e6af6a48
Status: Passed	Duration: 00:10 💡
Started: Mar 15, 2023 7:10 PM	Ended: Mar 15, 2023 7:10 PM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}