Bump http from 0.1.17 to 0.1.18

Bumps [http](https://github.com/hyperium/http) from 0.1.17 to 0.1.18.
- [Release notes](https://github.com/hyperium/http/releases)
- [Changelog](https://github.com/hyperium/http/blob/master/CHANGELOG.md)
- [Commits](https://github.com/hyperium/http/compare/v0.1.17...v0.1.18)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.lock

@@ -424,7 +424,7 @@ dependencies = [
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "http 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -439,7 +439,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "http"
-version = "0.1.17"
+version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -454,7 +454,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "http 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-buf 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -480,7 +480,7 @@ dependencies = [
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "h2 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "http 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "http-body 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "httparse 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1098,7 +1098,7 @@ dependencies = [
  "encoding_rs 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "flate2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "http 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.12.33 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper-tls 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1706,7 +1706,7 @@ dependencies = [
 "checksum glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 "checksum h2 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)" = "a5b34c246847f938a410a03c5458c7fee2274436675e76d8b903c08efc29c462"
 "checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
-"checksum http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)" = "eed324f0f0daf6ec10c474f150505af2c143f251722bf9dbd1261bd1f2ee2c1a"
+"checksum http 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)" = "372bcb56f939e449117fb0869c2e8fd8753a8223d92a172c6e808cf123a5b6e4"
 "checksum http-body 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6741c859c1b2463a423a1dbce98d418e6c3c3fc720fb0d45528657320920292d"
 "checksum httparse 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "cd179ae861f0c2e53da70d892f5f3029f9594be0c41dc5269cd371691b1dc2f9"
 "checksum humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ca7e5f2e110db35f93b837c81797f3714500b81d517bf20c431b16d3ca4f114"