Updated JGit to a version that has a patched HttpClient

[fdiotalevi]

It's likely a minor issue, but I realised that pom-explorer relies on a quite old version of JGit that uses a vulnerable version of HttpClient. See

• https://www.meterian.com/report/gh/ltearno/pom-explorer?hl=true
• https://github.com/eclipse/jgit/commit/510c865bad90f8710c3ebdabf03eff06ca5a38fa
• https://nvd.nist.gov/vuln/detail/CVE-2014-3577

The PR just replaces the vulnerable version with the latest version on the 4.0.x branch

[ltearno]

Thanks that's great ! I am merging your PR and maybe follow the other recommandations from the meterian web site. Thanks again 👍

[ltearno]

Sorry I forgot to add your commit before closing the PR