build(deps): bump httparse from 1.5.1 to 1.6.0 (#1477)

Bumps [httparse](https://github.com/seanmonstar/httparse) from 1.5.1 to 1.6.0.
- [Release notes](https://github.com/seanmonstar/httparse/releases)
- [Commits](seanmonstar/httparse@v1.5.1...v1.6.0)

---
updated-dependencies:
- dependency-name: httparse
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
(cherry picked from commit 500a5cf)
Signed-off-by: Oliver Gould <ver@buoyant.io>

Cargo.lock

@@ -432,9 +432,9 @@ dependencies = [
 
 [[package]]
 name = "httparse"
-version = "1.5.1"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "acd94fdbe1d4ff688b67b04eee2e17bd50995534a61539e45adfefb45e5e5503"
+checksum = "9100414882e15fb7feccb4897e5f0ff0ff1ca7d1a86a23208ada4d7a18e6c6c4"
 
 [[package]]
 name = "httpdate"

linkerd/proxy/http/Cargo.toml

@@ -19,7 +19,7 @@ futures = { version = "0.3", default-features = false }
 h2 = "0.3"
 http = "0.2"
 http-body = "0.4"
-httparse = "1.5"
+httparse = "1.6"
 hyper = { version = "0.14.16", features = ["client", "http1", "http2", "server", "stream", "runtime"] }
 hyper-balance = { path = "../../../hyper-balance" }
 linkerd-detect = { path = "../../detect" }