All jQuery versions prior to 3.4 are susceptible to prototype pollution.
In order to fix this issue, jQuery has been updated to version 3.4.0.

http://blog.jquery.com/2019/04/10/jquery-3-4-0-released/

Executed commands:

    yarn add --dev jquery@^3.4
    grunt build

Resolves: #88214
Releases: master, 9.5, 8.7
Change-Id: I8c8eed08b0dcec7fe6762dbc70b62064a60c1e73
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60557


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>