LCP JSON license injection regression bug (ZIP lib, stream event)

[danielweck]

https://www.edrlab.org/readium-lcp/testing-readium-lcp-compliant-devices/

===>

https://www.edrlab.org/public/feed/the-waste-land/the-waste-land.lcpl

===>

Uncaught Exception:
Error: cannot add entries after calling end()
at shouldIgnoreAdding (readium-desktop/node_modules/yazl/index.js:303:25)
at ZipFile.addReadStreamLazy (readium-desktop/node_modules/yazl/index.js:68:7)
at ZipFile.addReadStream (readium-desktop/node_modules/yazl/index.js:54:8)
at readium-desktop/node_modules/r2-utils-js/dist/es8-es2017/src/_utils/zip/zipInjector.js:53:29
at ZipFile.openReadStreamLowLevel (readium-desktop/node_modules/yauzl/index.js:511:3)
at readium-desktop/node_modules/yauzl/index.js:461:10
at readium-desktop/node_modules/yauzl/index.js:543:16
at readium-desktop/node_modules/yauzl/index.js:772:5
at readium-desktop/node_modules/yauzl/fd-slicer.js:33:7
at FSReqCallback.wrapper [as oncomplete] (node:fs:682:5)

===> non-fatal crash, but causes EPUB to successfully contain META-INF/license.lcpl but META-INF/encryption.xml is removed!!

[danielweck]

Related commit (no behaviour change, just better event tracing and code comments): 261342b