build(deps): bump pkg-config from 0.3.15 to 0.3.16

Bumps [pkg-config](https://github.com/rust-lang/pkg-config-rs) from 0.3.15 to 0.3.16.
- [Release notes](https://github.com/rust-lang/pkg-config-rs/releases)
- [Changelog](https://github.com/rust-lang/pkg-config-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/pkg-config-rs/compare/0.3.15...0.3.16)

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

Cargo.lock

@@ -744,7 +744,7 @@ dependencies = [
  "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "vcpkg 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -826,7 +826,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pkg-config"
-version = "0.3.15"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1726,7 +1726,7 @@ dependencies = [
 "checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"
 "checksum percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 "checksum pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5894c618ce612a3fa23881b152b608bafb8c56cfc22f434a3ba3120b40f7b587"
-"checksum pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c1d2cfa5a714db3b5f24f0915e74fcdf91d09d496ba61329705dda7774d2af"
+"checksum pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)" = "72d5370d90f49f70bd033c3d75e87fc529fbfff9d6f7cccef07d6170079d91ea"
 "checksum ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e3cbf9f658cdb5000fcf6f362b8ea2ba154b9f146a61c7a20d647034c6b6561b"
 "checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 "checksum proc-macro2 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4c5c2380ae88876faae57698be9e9775e3544decad214599c3a6266cca6ac802"