depends: Remove `hyper 0.14.2` pin

`hyper 0.14.18` stops building the C libraries by default (after opt-in
support was added via a new flag in nightly Cargo), which means we no
longer have the problem of the `cdylib` build requiring a linker to be
hooked up to the Rust build when all we want is a `staticlib`.

Cargo.lock

@@ -802,7 +802,7 @@ checksum = "31f4c6746584866f0feabcc69893c5b51beef3831656a968ed7ae254cdc4fd03"
 dependencies = [
  "bytes",
  "fnv",
- "itoa 1.0.1",
+ "itoa",
 ]
 
 [[package]]
@@ -824,15 +824,15 @@ checksum = "9100414882e15fb7feccb4897e5f0ff0ff1ca7d1a86a23208ada4d7a18e6c6c4"
 
 [[package]]
 name = "httpdate"
-version = "0.3.2"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "494b4d60369511e7dea41cf646832512a94e542f68bb9c49e54518e0f468eb47"
+checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
 [[package]]
 name = "hyper"
-version = "0.14.2"
+version = "0.14.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12219dc884514cb4a6a03737f4413c0e01c23a1b059b0156004b23f1e19dccbe"
+checksum = "b26ae0a80afebe130861d90abf98e3814a4f28a4c6ffeb5ab8ebb2be311e0ef2"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -842,9 +842,9 @@ dependencies = [
  "http-body",
  "httparse",
  "httpdate",
- "itoa 0.4.8",
- "pin-project",
- "socket2 0.3.19",
+ "itoa",
+ "pin-project-lite",
+ "socket2",
  "tokio",
  "tower-service",
  "tracing",
@@ -885,12 +885,6 @@ version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35e70ee094dc02fd9c13fdad4940090f22dbd6ac7c9e7094a46cf0232a50bc7c"
 
-[[package]]
-name = "itoa"
-version = "0.4.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
-
 [[package]]
 name = "itoa"
 version = "1.0.1"
@@ -953,7 +947,6 @@ dependencies = [
  "ed25519-zebra",
  "group",
  "gumdrop",
- "hyper",
  "incrementalmerkletree",
  "ipnet",
  "jubjub",
@@ -1401,26 +1394,6 @@ dependencies = [
  "siphasher",
 ]
 
-[[package]]
-name = "pin-project"
-version = "1.0.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58ad3879ad3baf4e44784bc6a718a8698867bb991f8ce24d1bcbe2cfb4c3a75e"
-dependencies = [
- "pin-project-internal",
-]
-
-[[package]]
-name = "pin-project-internal"
-version = "1.0.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "744b6f092ba29c3650faf274db506afd39944f48420f6c86b17cfe0ee1cb36bb"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "pin-project-lite"
 version = "0.2.8"
@@ -1801,17 +1774,6 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
 
-[[package]]
-name = "socket2"
-version = "0.3.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "122e570113d28d773067fab24266b66753f6ea915758651696b6e35e49f88d6e"
-dependencies = [
- "cfg-if 1.0.0",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "socket2"
 version = "0.4.4"
@@ -1917,7 +1879,7 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2702e08a7a860f005826c6815dcac101b19b5eb330c27fe4a5928fec1d20ddd"
 dependencies = [
- "itoa 1.0.1",
+ "itoa",
  "libc",
  "num_threads",
  "time-macros",
@@ -1953,7 +1915,7 @@ dependencies = [
  "libc",
  "mio",
  "pin-project-lite",
- "socket2 0.4.4",
+ "socket2",
  "tokio-macros",
  "winapi",
 ]

Cargo.toml

@@ -58,7 +58,6 @@ ed25519-zebra = "3"
 zeroize = "1.4.2"
 
 # Metrics
-hyper = { version = "=0.14.2", default-features = false, features = ["server", "tcp", "http1"] }
 ipnet = "2"
 metrics = "0.17"
 metrics-exporter-prometheus = "0.6"