Auto merge of #2805 - jtgeibel:cargo-update, r=JohnTitor

`cargo update`

r? `@JohnTitor`

```
Updating autocfg v1.0.0 -> v1.0.1
Removing base64 v0.11.0
Removing bufstream v0.1.4
Updating cc v1.0.58 -> v1.0.60
Updating chrono v0.4.13 -> v0.4.15
Updating comrak v0.8.0 -> v0.8.2
  Adding const_fn v0.4.2
Updating encoding_rs v0.8.23 -> v0.8.24
Updating flate2 v1.0.16 -> v1.0.17
Updating fs_extra v1.1.0 -> v1.2.0
Updating getrandom v0.1.14 -> v0.1.15
Updating git2 v0.13.8 -> v0.13.11
Updating handlebars v3.3.0 -> v3.4.0
Updating hashbrown v0.8.2 -> v0.9.0
  Adding httpdate v0.3.2
Updating hyper v0.13.7 -> v0.13.8
Updating hyperx v1.0.0 -> v1.1.0
Updating indexmap v1.5.1 -> v1.6.0
Updating instant v0.1.6 -> v0.1.7
Updating inventory v0.1.7 -> v0.1.9
Updating inventory-impl v0.1.7 -> v0.1.9
Updating js-sys v0.3.44 -> v0.3.45
Updating lettre v0.10.0-alpha.1 -> v0.10.0-alpha.2
Updating libc v0.2.74 -> v0.2.77
Updating libgit2-sys v0.12.9+1.0.1 -> v0.12.13+1.0.1
Updating libssh2-sys v0.2.18 -> v0.2.19
Updating libz-sys v1.0.25 -> v1.1.2
Removing line-wrap v0.1.1
Updating miniz_oxide v0.4.0 -> v0.4.2
Updating net2 v0.2.34 -> v0.2.35
Updating once_cell v1.4.0 -> v1.4.1
Updating ppv-lite86 v0.2.8 -> v0.2.9
Updating proc-macro2 v1.0.19 -> v1.0.21
  Adding quick-error v2.0.0
Updating reqwest v0.10.7 -> v0.10.8
Removing safemem v0.3.3
Updating serde v1.0.115 -> v1.0.116
Updating serde_derive v1.0.115 -> v1.0.116
  Adding shell-words v1.0.0
Updating smallvec v1.4.1 -> v1.4.2
Updating socket2 v0.3.12 -> v0.3.15
Updating standback v0.2.9 -> v0.2.10
Updating subtle v2.2.3 -> v2.3.0
Updating syn v1.0.38 -> v1.0.41
Updating tar v0.4.29 -> v0.4.30
Removing textnonce v0.7.1
Removing time v0.1.43
Removing time v0.2.16
  Adding time v0.1.44
  Adding time v0.2.20
Updating tracing-attributes v0.1.10 -> v0.1.11
Updating tracing-core v0.1.14 -> v0.1.16
  Adding wasi v0.10.0+wasi-snapshot-preview1
Updating wasm-bindgen v0.2.67 -> v0.2.68
Updating wasm-bindgen-backend v0.2.67 -> v0.2.68
Updating wasm-bindgen-futures v0.4.17 -> v0.4.18
Updating wasm-bindgen-macro v0.2.67 -> v0.2.68
Updating wasm-bindgen-macro-support v0.2.67 -> v0.2.68
Updating wasm-bindgen-shared v0.2.67 -> v0.2.68
Updating web-sys v0.3.44 -> v0.3.45
  Adding xdg v2.2.0
```

Author: bors