Run cargo update

log:
```
    Updating crates.io index
      Adding arrayvec v0.5.2
    Updating bitflags v1.2.1 -> v1.3.2
    Updating bstr v0.2.16 -> v0.2.17
    Updating cargo-platform v0.1.1 -> v0.1.2
    Updating cc v1.0.69 -> v1.0.71
    Updating core-foundation v0.9.1 -> v0.9.2
    Updating core-foundation-sys v0.8.2 -> v0.8.3
    Updating filetime v0.2.14 -> v0.2.15
    Updating flate2 v1.0.20 -> v1.0.22
    Updating git2 v0.13.20 -> v0.13.23
    Updating itoa v0.4.7 -> v0.4.8
    Updating jobserver v0.1.22 -> v0.1.24
    Updating libc v0.2.98 -> v0.2.103
    Updating libgit2-sys v0.12.21+1.1.0 -> v0.12.24+1.3.0
    Updating libnghttp2-sys v0.1.6+1.43.0 -> v0.1.7+1.45.0
    Updating libssh2-sys v0.2.21 -> v0.2.23
    Updating matches v0.1.8 -> v0.1.9
    Updating memchr v2.4.0 -> v2.4.1
    Updating openssl v0.10.35 -> v0.10.36
    Updating openssl-sys v0.9.65 -> v0.9.67
    Updating pkg-config v0.3.19 -> v0.3.20
    Updating ppv-lite86 v0.2.10 -> v0.2.14
    Updating proc-macro2 v1.0.28 -> v1.0.30
    Updating quote v1.0.9 -> v1.0.10
    Updating redox_syscall v0.2.9 -> v0.2.10
    Updating socket2 v0.4.1 -> v0.4.2
    Updating strip-ansi-escapes v0.1.0 -> v0.1.1
    Updating syn v1.0.74 -> v1.0.80
    Updating tar v0.4.35 -> v0.4.37
    Updating tinyvec v1.3.1 -> v1.5.0
    Updating typenum v1.13.0 -> v1.14.0
    Updating unicode-bidi v0.3.5 -> v0.3.7
    Updating unicode-width v0.1.8 -> v0.1.9
    Updating utf8parse v0.1.1 -> v0.2.0
    Updating vte v0.3.3 -> v0.10.1
      Adding vte_generate_state_changes v0.1.1
```

Author: JohnTitor