tsc skipped in build process

[ktomaszx]

Hi, I don't have much experience with ts but seems like this commit e38bccc
didn't fix Error: error:0308010C:digital envelope routines::unsupported
"build": "set NODE_OPTIONS=--openssl-legacy-provider tsc", makes that tsc command is not run at all
so changes made to main.ts are not reflected in index.js
I would suggest adding && between commands
also I noticed that export should be used instead of set command

[ktomaszx]

changes proposal #67