Fix stack traces from worker to be rooted in ./src instead of ./dist

[woodser]

Currently stack traces for errors within the web worker are rooted in ./dist.

For example, if there is an unexpected error within MoneroWalletFull.sync(), the stack track looks like:

Error: My test error
    at LibraryUtils.deserializeError (/Users/woodser/git/monero-ts/dist/src/main/ts/common/LibraryUtils.js:262:106)
    at LibraryUtils.invokeWorker (/Users/woodser/git/monero-ts/dist/src/main/ts/common/LibraryUtils.js:251:26)
    at async MoneroWalletFullProxy.invokeWorker (/Users/woodser/git/monero-ts/dist/src/main/ts/wallet/MoneroWalletKeys.js:476:12)
    at async MoneroWalletFullProxy.sync (/Users/woodser/git/monero-ts/dist/src/main/ts/wallet/MoneroWalletFull.js:1978:24)
    at async TestUtils.getWalletFull (/Users/woodser/git/monero-ts/dist/src/test/utils/TestUtils.js:238:5)
    at async Context.<anonymous> (/Users/woodser/git/monero-ts/dist/src/test/TestSampleCode.js:32:20)
Worker error: Error: My test error
    at MoneroWalletFull.sync (/Users/woodser/git/monero-ts/src/main/ts/wallet/MoneroWalletFull.ts:565:21)
    at self.sync (/Users/woodser/git/monero-ts/src/main/ts/common/MoneroWebWorker.ts:614:11)
    at self.onmessage (/Users/woodser/git/monero-ts/src/main/ts/common/MoneroWebWorker.ts:49:49)
    1) "before all" hook for "Sample code demonstration"

The line numbers are correct but point to *.js files within monero-ts/dist.

That's because the web worker is compiled and always run from ./dist.

This issue requests fixing the stack traces (their source maps) to be rooted in monero-ts/src and with the correct *.ts extensions for worker errors.