Bump chrono from 0.4.6 to 0.4.7 (#4812)

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.6 to 0.4.7.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/master/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono/compare/v0.4.6...v0.4.7)

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

programs/budget_api/Cargo.toml

@@ -10,7 +10,7 @@ edition = "2018"
 
 [dependencies]
 bincode = "1.1.4"
-chrono = { version = "0.4.0", features = ["serde"] }
+chrono = { version = "0.4.7", features = ["serde"] }
 log = "0.4.2"
 num-derive = "0.2"
 num-traits = "0.2"