Compatibility with browser JS

[ProgramCrafter]

In-browser FunC compilation would be a great thing for dApps.

Currently attempt to load the library (through https://unpkg.com/ton-contract-executor@0.6.2/dist/index.js) gives the error

Uncaught ReferenceError: exports is not defined

[ProgramCrafter]

If this is a hard task, I think a TON Footstep can be created for it.