Hardcoded path to MoneroWebWorker.dist.js
Good Evening,

currently I am creating an web-application based on your [sample app](https://github.com/woodser/xmr-sample-app). With the given instructions its super easy to start the application and work with the library.

But when I extend the source with a new page lying in a subdirectory, the library tries to load the "MoneroWebWorker.dist.js" worker code from this directory e.g.

Does work:
```html
<!-- /index.html -->
<script type="text/javascript" src="/sample_code.dist.js"></script>
```
Result: `GET http://localhost:9100/subfolder/MoneroWebWorker.dist.js 200 OK`

Does not work:
```html
<!-- /subdirectory/index.html -->
<script type="text/javascript" src="/sample_code.dist.js"></script>
```
Result:  `GET http://localhost:9100/subfolder/MoneroWebWorker.dist.js 404 (File not found)`

A quick look at the source code made the problem obvious:

https://github.com/monero-ecosystem/monero-javascript/blob/307f09f1627ed16e967599887e6dd9a781440196/src/main/js/common/LibraryUtils.js#L133

I don't know whether this script needs to be referenced relative or not. Are there any plans to change this behaviour? Right now I'm forking the project and specifying the absolute path by hand but this seems to be a bit of an overkill for this small change.

Thank you for your attention to this matter.
