Update atlassian-gadgets to 4.2.39 to fix CVE-2012-0881, CVE-2014-0114 and other vulnerabilities

Affected versions of Atlassian Fisheye and Crucible allow an unauthenticated remote attacker to achieve remote code execution, denial of service and XML external entities in Atlassian Gadgets. The CVEs involved were: CVE-2012-0881 CVE-2019-10172 CVE-2018-1000632 CVE-2016-1000031 CVE-2014-0114...