Bump snafu from 0.6.9 to 0.6.10

Bumps [snafu](https://github.com/shepmaster/snafu) from 0.6.9 to 0.6.10.
- [Release notes](https://github.com/shepmaster/snafu/releases)
- [Changelog](https://github.com/shepmaster/snafu/blob/master/CHANGELOG.md)
- [Commits](https://github.com/shepmaster/snafu/compare/0.6.9...0.6.10)

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

Cargo.lock

@@ -74,9 +74,9 @@ dependencies = [
 
 [[package]]
 name = "snafu"
-version = "0.6.9"
+version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c4e6046e4691afe918fd1b603fd6e515bcda5388a1092a9edbada307d159f09"
+checksum = "eab12d3c261b2308b0d80c26fffb58d17eba81a4be97890101f416b478c79ca7"
 dependencies = [
  "doc-comment",
  "snafu-derive",
@@ -84,9 +84,9 @@ dependencies = [
 
 [[package]]
 name = "snafu-derive"
-version = "0.6.9"
+version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7073448732a89f2f3e6581989106067f403d378faeafb4a50812eb814170d3e5"
+checksum = "1508efa03c362e23817f96cde18abed596a25219a8b2c66e8db33c03543d315b"
 dependencies = [
  "proc-macro2",
  "quote",