fix: fix generation of NPM release package (#75, #78)

[aeworxet]

This PR adds building of the TypeScript code (transpilation to JavaScript) during release process, which was not required before migration of the codebase to TS, and therefore did not exist.
Due to absence of this step, after migration to TS NPM package was released without lib directory, which made the package unusable for end users.

Besides adding the building step, this PR also modifies files array of the package.json to include in the package file API.md.

Fixes #75
Fixes #78

[aeworxet]

Changed "lib/" to "/lib".

Implemented separation of concerns, as

"build": "tsc",
"generate:assets": "npm run docs && npm run generate:readme:toc",
"prepublishOnly": "npm run build && npm run generate:assets"

Modified files array to include API.md.

"files": [
  "API.md",
  ...
],

[Souvikns]

👍🏼 looking good.

[aeworxet]

Now it's looking even better after returning everything back.

[derberg]

[Souvikns]

👍🏼

[aeworxet]

/rtm

[asyncapi-bot]

🎉 This PR is included in version 0.3.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀