Bump snafu from 0.6.10 to 0.7.3

Bumps [snafu](https://github.com/shepmaster/snafu) from 0.6.10 to 0.7.3.
- [Release notes](https://github.com/shepmaster/snafu/releases)
- [Changelog](https://github.com/shepmaster/snafu/blob/main/CHANGELOG.md)
- [Commits](https://github.com/shepmaster/snafu/compare/0.6.10...0.7.3)

---
updated-dependencies:
- dependency-name: snafu
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Cargo.lock

@@ -198,6 +198,12 @@ version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
 
+[[package]]
+name = "heck"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2540771e65fc8cb83cd6e8a237f70c319bd5c29f78ed1084ba5d50eeac86f7f9"
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -523,9 +529,9 @@ dependencies = [
 
 [[package]]
 name = "snafu"
-version = "0.6.10"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eab12d3c261b2308b0d80c26fffb58d17eba81a4be97890101f416b478c79ca7"
+checksum = "a152ba99b054b22972ee794cf04e5ef572da1229e33b65f3c57abbff0525a454"
 dependencies = [
  "doc-comment",
  "snafu-derive",
@@ -533,10 +539,11 @@ dependencies = [
 
 [[package]]
 name = "snafu-derive"
-version = "0.6.10"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1508efa03c362e23817f96cde18abed596a25219a8b2c66e8db33c03543d315b"
+checksum = "d5e79cdebbabaebb06a9bdbaedc7f159b410461f63611d4d0e3fb0fab8fed850"
 dependencies = [
+ "heck",
  "proc-macro2",
  "quote",
  "syn",

Cargo.toml

@@ -38,7 +38,7 @@ rayon = "1.5.1"
 regex = "1.5.4"
 serde_yaml = "0.8.23"
 slug = "0.1.4"
-snafu = "0.6.10"
+snafu = "0.7.3"
 
 [dev-dependencies]
 pretty_assertions = "1.0.0"