Update jquery to 3.4.0 or newer

[iadgovuser1]

Please check uses of jquery in the project. There was a recent vulnerability fixed in 3.4.0 and newer versions of jquery. Additional info:

• https://nvd.nist.gov/vuln/detail/CVE-2019-11358
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11358
• https://snyk.io/vuln/SNYK-JS-JQUERY-174006
• https://snyk.io/blog/after-three-years-of-silence-a-new-jquery-prototype-pollution-vulnerability-emerges-once-again/