Bump tokio-fs from 0.1.6 to 0.1.7

Bumps [tokio-fs](https://github.com/tokio-rs/tokio) from 0.1.6 to 0.1.7.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Changelog](https://github.com/tokio-rs/tokio/blob/tokio-0.1.7/CHANGELOG.md)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-fs-0.1.6...tokio-0.1.7)

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

Cargo.lock

@@ -5935,9 +5935,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-fs"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fe6dc22b08d6993916647d108a1a7d15b9cd29c4f4496c62b92c45b5041b7af"
+checksum = "297a1206e0ca6302a0eed35b700d292b275256f596e2f3fea7729d5e629b6ff4"
 dependencies = [
  "futures",
  "tokio-io",