RFR: build: update to JUnit 5.8.2 [v2]

[Erik Joelsson]

On Tue, 14 Dec 2021 14:15:18 GMT, Christian Stein <cstein at openjdk.org> wrote:

>> This patch that updates JUnit Jupiter to 5.8.2 and JUnit Platform to 1.8.2.
>> 
>> PS: The text at https://github.com/openjdk/skara#testing reading "_JUnit 5.6.2 or later is required to run the unit tests._" seems to be out of date. Shouldn't it read like: "A recent version of JUnit 5 is..."?
>
> Christian Stein has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update README.md

Marked as reviewed by erikj (Lead).

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PR: https://git.openjdk.java.net/skara/pull/1260