Don't block JS event loop when parsing build info

[agostbiro]

Definition of Done

Parsing build info in the EDR provider NAPI constructor should be done on a thread from the blocking thread pool to avoid blocking the JS event loop, but that's difficult to achieve, because the constructor is not an async function (precluded by the Env argument not being Send) and the contract decoder needs to be passed in to the logger which also needs the Env.