change browser workspace building.

[gaterking]

ref: change browser workspace building. Use typescript code in another packages instead of using dist/*.js. It can reduce the bundle size by use tslib be shared.
In original building, there are many same code such as __assign, __generator builded by different package.
#1552 (comment)

Before submitting a pull request, please take a look at our
Contributing guidelines and verify:

• If you've added code that should be tested, please add tests.
• Ensure your code lints and the test suite passes (yarn lint) & (yarn test).

[kamilogorek]

@gaterking thank you! It works like a charm. I tested it locally and calculated the diff:

no-compression:
bundle.js 312.1kB => 263.5kB (-48.6kB, -16%)
bundle.min.js 91.5kB => 66.3kB (-25.2kB, **-28%**)

gzip:
bundle.js 60.5kB => 54.6kB (-5.9kB, -10%)
bundle.min.js 24.1kB => 21.4kB (-2.7kB, **-11%**)

Can you remove one outstanding comment from tsconfig?

[kamilogorek]

Thanks! :)