Bump snafu from 0.6.10 to 0.7.0

Bumps [snafu](https://github.com/shepmaster/snafu) from 0.6.10 to 0.7.0.
- [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...0.7.0)

---
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 +198,15 @@ version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
 
+[[package]]
+name = "heck"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -523,9 +532,9 @@ dependencies = [
 
 [[package]]
 name = "snafu"
-version = "0.6.10"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eab12d3c261b2308b0d80c26fffb58d17eba81a4be97890101f416b478c79ca7"
+checksum = "2eba135d2c579aa65364522eb78590cdf703176ef71ad4c32b00f58f7afb2df5"
 dependencies = [
  "doc-comment",
  "snafu-derive",
@@ -533,10 +542,11 @@ dependencies = [
 
 [[package]]
 name = "snafu-derive"
-version = "0.6.10"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1508efa03c362e23817f96cde18abed596a25219a8b2c66e8db33c03543d315b"
+checksum = "7a7fe9b0669ef117c5cabc5549638528f36771f058ff977d7689deb517833a75"
 dependencies = [
+ "heck",
  "proc-macro2",
  "quote",
  "syn",
@@ -585,6 +595,12 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
+
 [[package]]
 name = "unicode-width"
 version = "0.1.9"

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 = "0.7.0"
 
 [dev-dependencies]
 pretty_assertions = "1.0.0"