Bump nix from 0.25.0 to 0.26.1

Bumps [nix](https://github.com/nix-rust/nix) from 0.25.0 to 0.26.1.
- [Release notes](https://github.com/nix-rust/nix/releases)
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nix-rust/nix/compare/v0.25.0...v0.26.1)

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

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

Cargo.lock

@@ -1347,9 +1347,9 @@ checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
 name = "memoffset"
-version = "0.6.5"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
+checksum = "5de893c32cde5f383baa4c04c5d6dbdd735cfd4a794b0debdb2bb1b421da5ff4"
 dependencies = [
  "autocfg",
 ]
@@ -1395,16 +1395,16 @@ dependencies = [
 
 [[package]]
 name = "nix"
-version = "0.25.1"
+version = "0.26.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f346ff70e7dbfd675fe90590b92d59ef2de15a8779ae305ebcbfd3f0caf59be4"
+checksum = "46a58d1d356c6597d08cde02c2f09d785b09e28711837b1ed667dc652c08a694"
 dependencies = [
- "autocfg",
  "bitflags",
  "cfg-if",
  "libc",
  "memoffset",
  "pin-utils",
+ "static_assertions",
 ]
 
 [[package]]
@@ -2329,6 +2329,12 @@ dependencies = [
  "lock_api",
 ]
 
+[[package]]
+name = "static_assertions"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
+
 [[package]]
 name = "strsim"
 version = "0.10.0"

crates/shadowsocks-service/Cargo.toml

@@ -126,7 +126,7 @@ shadowsocks = { version = "1.15.0", path = "../shadowsocks", default-features =
 
 # Just for the ioctl call macro
 [target.'cfg(any(target_os = "macos", target_os = "ios", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))'.dependencies]
-nix = "0.25"
+nix = "0.26"
 
 [target.'cfg(windows)'.dependencies]
 windows-sys = { version = "0.42", features = ["Win32_Networking_WinSock"] }