Update pin-project-lite requirement from 0.1 to 0.2

Updates the requirements on [pin-project-lite](https://github.com/taiki-e/pin-project-lite) to permit the latest version.
- [Release notes](https://github.com/taiki-e/pin-project-lite/releases)
- [Changelog](https://github.com/taiki-e/pin-project-lite/blob/master/CHANGELOG.md)
- [Commits](taiki-e/pin-project-lite@v0.1.0...v0.2.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

tokio-postgres/Cargo.toml

@@ -45,7 +45,7 @@ futures = "0.3"
 log = "0.4"
 parking_lot = "0.11"
 percent-encoding = "2.0"
-pin-project-lite = "0.1"
+pin-project-lite = "0.2"
 phf = "0.8"
 postgres-protocol = { version = "0.5.0", path = "../postgres-protocol" }
 postgres-types = { version = "0.1.2", path = "../postgres-types" }