[jdk11u-dev] RFR: 8265524 Upgrading JSZip from v3.2.2 to v3.6.0

[Goetz Lindenmaier]

I want to "backport" 8265524 to jdk11u.
Unfortunately, the original issue has no patch attached, it's only Oracle internal.
So normal backporting does not work.

Luckily, the bug nicely describes where to get the sources, so I crafted the change myself.
So please review. Ev. compare to https://github.com/Stuk/jszip/releases v.3.6.0.
I also adapted the license as happened in "JDK-8236700 Upgrading JSZip from v3.1.5 to v3.2.2".
That is the MIT license from th jszip github repo.

I'm not completely clear whether this should be considered a Backport, or a new Enhancement.
Also, I guess, the bots will not grok this is a backport, I will have to update the JBS issue accordingly.
I might even have a problem submitting this because I used the bugID of the original issue.

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Commit messages:
 - 8265524 Upgrading JSZip from v3.2.2 to v3.6.0

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/439/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=439&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265524
  Stats: 11353 lines in 3 files changed: 2 ins; 11339 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/439.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/439/head:pull/439

PR: https://git.openjdk.java.net/jdk11u-dev/pull/439