Please, update to newer cargo, dependencies no longer build

[Jan Hudec]

The cargo version used depends on libgit2-sys v0.4.6, which no longer builds on Debian Testing. Since newer versions build just fine, the easiest fix would be to update to newer cargo.

The errors are:

libgit2-sys-0.4.6/libgit2/src/openssl_stream.c:146:3: error: dereferencing pointer to incomplete type ‘BIO {aka struct bio_st}’
libgit2-sys-0.4.6/libgit2/src/openssl_stream.c:204:1: error: variable ‘git_stream_bio_method’ has initializer but incomplete type

[Onur Aslan]

Thanks for reporting. I am using Debian Sid and it is building fine.

But I'll definitely update this crate.

[Jan Hudec]

Works ok. Thanks.