Bump hashbrown from 0.2.2 to 0.3.1 (#5381)

Bumps [hashbrown](https://github.com/rust-lang/hashbrown) from 0.2.2 to 0.3.1.
- [Release notes](https://github.com/rust-lang/hashbrown/releases)
- [Changelog](https://github.com/rust-lang/hashbrown/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/hashbrown/compare/v0.2.2...v0.3.1)

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

runtime/Cargo.toml

@@ -14,7 +14,7 @@ bv = { version = "0.11.0", features = ["serde"] }
 byteorder = "1.3.2"
 fnv = "1.0.6"
 fs_extra = "1.1.0"
-hashbrown = "0.2.0"
+hashbrown = "0.3.1"
 lazy_static = "1.3.0"
 libc = "0.2.58"
 libloading = "0.5.2"