build(deps): bump pin-project from 0.4.7 to 0.4.8

Bumps [pin-project](https://github.com/taiki-e/pin-project) from 0.4.7 to 0.4.8.
- [Release notes](https://github.com/taiki-e/pin-project/releases)
- [Changelog](https://github.com/taiki-e/pin-project/blob/master/CHANGELOG.md)
- [Commits](https://github.com/taiki-e/pin-project/compare/v0.4.7...v0.4.8)

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

Cargo.lock

@@ -484,7 +484,7 @@ dependencies = [
  "itoa 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "pin-project 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-project 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tower-service 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -792,15 +792,15 @@ dependencies = [
 
 [[package]]
 name = "pin-project"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "pin-project-internal 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-project-internal 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1671,8 +1671,8 @@ dependencies = [
 "checksum percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 "checksum phf 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3dfb61232e34fcb633f43d12c58f83c1df82962dcdfa565a4e866ffc17dafe12"
 "checksum phf_shared 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c00cf8b9eafe68dde5e9eaa2cef8ee84a9336a47d566ec55ca16589633b65af7"
-"checksum pin-project 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "75fca1c4ff21f60ca2d37b80d72b63dab823a9d19d3cda3a81d18bc03f0ba8c5"
-"checksum pin-project-internal 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "6544cd4e4ecace61075a6ec78074beeef98d58aa9a3d07d053d993b2946a90d6"
+"checksum pin-project 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7804a463a8d9572f13453c516a5faea534a2403d7ced2f0c7e100eeff072772c"
+"checksum pin-project-internal 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "385322a45f2ecf3410c68d2a549a4a2685e8051d0f278e39743ff4e451cb9b3f"
 "checksum pin-project-lite 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "237844750cfbb86f67afe27eee600dfbbcb6188d734139b534cbfbf4f96792ae"
 "checksum pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5894c618ce612a3fa23881b152b608bafb8c56cfc22f434a3ba3120b40f7b587"
 "checksum pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)" = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"