Auto merge of #202 - JohnTitor:update-deps, r=JohnTitor

Update dependencies

This just runs `cargo update`.

log:
```
Updating crates.io index
    Updating adler v0.2.3 -> v1.0.2
    Updating aho-corasick v0.7.14 -> v0.7.18
    Updating bstr v0.2.14 -> v0.2.16
    Updating cc v1.0.61 -> v1.0.69
    Removing cfg-if v0.1.10
    Updating crossbeam-utils v0.8.1 -> v0.8.5
    Updating filetime v0.2.12 -> v0.2.14
    Updating flate2 v1.0.18 -> v1.0.20
      Adding form_urlencoded v1.0.1
    Updating getrandom v0.2.1 -> v0.2.3
    Updating git2 v0.13.17 -> v0.13.20
    Updating globset v0.4.6 -> v0.4.8
    Updating hermit-abi v0.1.17 -> v0.1.19
    Updating hex v0.4.2 -> v0.4.3
    Updating humantime v2.0.1 -> v2.1.0
    Updating idna v0.2.0 -> v0.2.3
    Updating ignore v0.4.17 -> v0.4.18
    Updating itoa v0.4.6 -> v0.4.7
    Updating jobserver v0.1.21 -> v0.1.22
    Updating libc v0.2.93 -> v0.2.98
    Updating libgit2-sys v0.12.18+1.1.0 -> v0.12.21+1.1.0
    Updating libnghttp2-sys v0.1.4+1.41.0 -> v0.1.6+1.43.0
    Updating libssh2-sys v0.2.19 -> v0.2.21
    Updating libz-sys v1.1.2 -> v1.1.3
    Updating memchr v2.3.4 -> v2.4.0
    Updating miniz_oxide v0.4.3 -> v0.4.4
    Updating miow v0.3.6 -> v0.3.7
      Adding once_cell v1.8.0
    Updating openssl v0.10.30 -> v0.10.35
    Updating openssl-probe v0.1.2 -> v0.1.4
    Updating openssl-sys v0.9.58 -> v0.9.65
    Updating ppv-lite86 v0.2.9 -> v0.2.10
    Updating proc-macro2 v1.0.24 -> v1.0.27
    Updating quote v1.0.7 -> v1.0.9
    Updating rand v0.8.3 -> v0.8.4
    Updating rand_chacha v0.3.0 -> v0.3.1
    Updating rand_core v0.6.1 -> v0.6.3
    Updating rand_hc v0.3.0 -> v0.3.1
    Removing redox_syscall v0.1.57
    Removing redox_syscall v0.2.4
      Adding redox_syscall v0.2.9
    Updating regex v1.4.2 -> v1.5.4
    Updating regex-syntax v0.6.21 -> v0.6.25
    Updating sized-chunks v0.6.2 -> v0.6.5
    Removing socket2 v0.3.19
    Updating syn v1.0.60 -> v1.0.73
    Updating tar v0.4.30 -> v0.4.35
    Updating termcolor v1.1.0 -> v1.1.2
    Updating thread_local v1.0.1 -> v1.1.3
    Updating tinyvec v0.3.4 -> v1.2.0
      Adding tinyvec_macros v0.1.0
    Updating toml v0.5.7 -> v0.5.8
    Updating typenum v1.12.0 -> v1.13.0
    Updating unicode-bidi v0.3.4 -> v0.3.5
    Updating unicode-normalization v0.1.13 -> v0.1.19
    Updating unicode-xid v0.2.1 -> v0.2.2
    Updating url v2.1.1 -> v2.2.2
    Updating vcpkg v0.2.10 -> v0.2.15
    Updating version_check v0.9.2 -> v0.9.3
    Updating walkdir v2.3.1 -> v2.3.2
    Updating wasi v0.10.1+wasi-snapshot-preview1 -> v0.10.2+wasi-snapshot-preview1
```

Author: bors