build(deps): bump socket2 from 0.4.2 to 0.4.3 (#1439)

(cherry picked from commit d4dfe91)
Signed-off-by: Oliver Gould <ver@buoyant.io>

Cargo.lock

@@ -450,7 +450,7 @@ dependencies = [
  "httpdate",
  "itoa 0.4.8",
  "pin-project-lite",
- "socket2 0.4.2",
+ "socket2 0.4.3",
  "tokio",
  "tower-service",
  "tracing",
@@ -778,7 +778,7 @@ dependencies = [
  "linkerd-tracing",
  "linkerd2-proxy-api",
  "regex",
- "socket2 0.4.2",
+ "socket2 0.4.3",
  "tokio",
  "tokio-rustls",
  "tokio-stream",
@@ -1229,7 +1229,7 @@ dependencies = [
  "linkerd-error",
  "linkerd-io",
  "linkerd-stack",
- "socket2 0.4.2",
+ "socket2 0.4.3",
  "thiserror",
  "tokio",
  "tokio-stream",
@@ -2036,9 +2036,9 @@ dependencies = [
 
 [[package]]
 name = "socket2"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5dc90fe6c7be1a323296982db1836d1ea9e47b6839496dde9a541bc496df3516"
+checksum = "0f82496b90c36d70af5fcd482edaa2e0bd16fade569de1330405fecbbdac736b"
 dependencies = [
  "libc",
  "winapi",