Bump regex from 1.7.2 to 1.7.3

Bumps [regex](https://github.com/rust-lang/regex) from 1.7.2 to 1.7.3.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](rust-lang/regex@1.7.2...1.7.3)

---
updated-dependencies:
- dependency-name: regex
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -22,7 +22,7 @@ aoc-runner-derive = "0.3.0"
 itertools = "0.10.5"
 lazy_static = "1.4.0"
 lexical = "6.1.1"
-regex = "1.7.2"
+regex = "1.7.3"
 regex-macro = "0.2.0"
 ring-algorithm = "0.7.0"
 serde_scan = "0.4.1"