Changelog: swc v1.2.19

Bugfixes

optional constructor property parameters (#959)

Previously test? in the code below was miscompiled. It's now fixed and swc generates correct output.

export class Test {

constructor(readonly test?: string) {}

}

Some dce bugs (#959)

While abstraction of the spack, I added much more test cases and fixed some tree-shaking bugs.

Improvements

cyclic dependencies (#959)

spack now supprots cyclic dependencies between es modules.