Bump regex from 1.3.6 to 1.3.7

Bumps [regex](https://github.com/rust-lang/regex) from 1.3.6 to 1.3.7.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/regex/compare/1.3.6...regex-1.3.7)

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

ledger/Cargo.toml

@@ -27,7 +27,7 @@ rand = "0.6.5"
 rand_chacha = "0.1.1"
 rayon = "1.3.0"
 reed-solomon-erasure = { version = "4.0.2", features = ["simd-accel"] }
-regex = "1.3.6"
+regex = "1.3.7"
 serde = "1.0.106"
 serde_bytes = "0.11.3"
 solana-transaction-status = { path = "../transaction-status", version = "1.2.0" }