根据 avik 在 JuliaLang Discourse 上的回答:

According to this answer at JuliaLang Discourse by avik:

• https://discourse.julialang.org/t/pkg-update-error-base-libgit2-test-fails/9272/11

这是一个通过以下方式解决的问题:

This is an issue which is solved by:

• https://support.microsoft.com/en-us/help/3140245/update-to-enable-tls-1-1-and-tls-1-2-as-a-a-default-secure-protocols-in

请务必按照这些说明进行操作，如果遇到困难也可以在 Gitter 频道寻求帮助:

Please make sure to follow those instructions, you could also ask for help at the Gitter channel if you get stuck:

• https://gitter.im/JuliaLang/julia