nodegit consumes libssh2 1.8.0, which has the following security advisories:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3855
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3856
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3857
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3858
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3859
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3860
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3861
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3862
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3863

Our vulnerability scanner, which is flagging us as being insecure because of these, suggests moving up to at least v1.8.1 of this dependency to mitigate these issues.