Updated XQueryParser

[ccheraa]

I have updated the XQueryParser with the latest version available at https://www.bottlecaps.de/rex/ which conforms to W3C standards.

fixes eXist-db/eXide#224

This open source contribution to the xqlint project was commissioned by the Office of the Historian, U.S. Department of State, https://history.state.gov.

[joewiz]

I tested this by manually checking out this branch to eXide's support subdirectory (and temporarily renaming the original submodule). I can confirm that this fixes the xqlint problems that I reported in the linked issue.

[joewiz]

@ccheraa Two questions:

1. I performed a diff between the lib/XQueryParser.ebnf in your PR and xquery-31.ebnf retrieved from https://www.bottlecaps.de/rex/xquery-31.ebnf, and 2 differences appeared. Could you explain why these differences are present?
2. Could you describe the procedure you used to generate the lib/XQueryParser.js file (or link to where the directions live)? I ask in case we ever need to perform this procedure again.

[ccheraa]

@joewiz I found some issues with the PR as it is, I would like to fix them first.