Run `cargo update`
Run `cargo update`

```
Updating adler32 v1.0.4 -> v1.1.0
Updating arc-swap v0.4.6 -> v0.4.7
Updating backtrace v0.3.48 -> v0.3.49
Updating base64 v0.12.1 -> v0.12.2
Updating bytes v0.5.4 -> v0.5.5
Updating ctor v0.1.14 -> v0.1.15
Updating ctrlc v3.1.2 -> v3.1.4
Updating diesel v1.4.4 -> v1.4.5
Updating dtoa v0.4.5 -> v0.4.6
Updating filetime v0.2.6 -> v0.2.10
  Adding generator v0.6.21
Updating ghost v0.1.1 -> v0.1.2
Updating hermit-abi v0.1.13 -> v0.1.14
Updating inventory v0.1.6 -> v0.1.7
Updating inventory-impl v0.1.6 -> v0.1.7
Updating itoa v0.4.5 -> v0.4.6
Updating libgit2-sys v0.12.6+1.0.0 -> v0.12.7+1.0.0
  Adding loom v0.3.4
Updating miniz_oxide v0.3.6 -> v0.3.7
Updating new_debug_unreachable v1.0.3 -> v1.0.4
Updating nix v0.13.0 -> v0.17.0
Updating num-integer v0.1.42 -> v0.1.43
Updating num-traits v0.2.11 -> v0.2.12
Updating object v0.19.0 -> v0.20.0
Updating openssl-sys v0.9.57 -> v0.9.58
Updating pin-project v0.4.17 -> v0.4.22
Updating pin-project-internal v0.4.17 -> v0.4.22
Updating pin-project-lite v0.1.6 -> v0.1.7
Updating proc-macro-nested v0.1.4 -> v0.1.6
Updating quote v1.0.6 -> v1.0.7
Updating remove_dir_all v0.5.2 -> v0.5.3
Updating ring v0.16.14 -> v0.16.15
  Adding scoped-tls v0.1.2
Updating serde v1.0.111 -> v1.0.113
Updating serde_derive v1.0.111 -> v1.0.113
Updating serde_json v1.0.53 -> v1.0.55
Updating standback v0.2.8 -> v0.2.9
Updating strsim v0.9.2 -> v0.9.3
Updating syn v1.0.30 -> v1.0.31
Updating synstructure v0.12.3 -> v0.12.4
Updating tar v0.4.26 -> v0.4.29
Updating tendril v0.4.0 -> v0.4.1
Updating threadpool v1.7.1 -> v1.8.1
  Adding tinyvec v0.3.3
Updating tracing v0.1.14 -> v0.1.15
Updating typed-arena v1.4.1 -> v1.7.0
Updating unicode-normalization v0.1.12 -> v0.1.13
Updating vcpkg v0.2.9 -> v0.2.10
```

rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io