Bump once_cell from 1.4.1 to 1.5.1 (#652)

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.4.1 to 1.5.1.
- [Release notes](https://github.com/matklad/once_cell/releases)
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](https://github.com/matklad/once_cell/compare/v1.4.1...v1.5.1)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Cargo.lock

@@ -685,9 +685,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.4.1"
+version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "260e51e7efe62b592207e9e13a68e43692a7a279171d6ba57abd208bf23645ad"
+checksum = "f53cef67919d7d247eb9a2f128ca9e522789967ef1eb4ccd8c71a95a8aedf596"
 
 [[package]]
 name = "opaque-debug"

Cargo.toml

@@ -44,7 +44,7 @@ toml = "0.5.7"
 parking_lot = "0.11.0"
 dashmap = { version = "3.11.10", features = ["serde"] }
 num-format = "0.4.0"
-once_cell = "1.4.1"
+once_cell = "1.5.1"
 regex = "1.4.2"
 serde_json = "1.0.59"