Bump futures from 0.1.27 to 0.1.28

Bumps [futures](https://github.com/rust-lang-nursery/futures-rs) from 0.1.27 to 0.1.28.
- [Release notes](https://github.com/rust-lang-nursery/futures-rs/releases)
- [Changelog](https://github.com/rust-lang-nursery/futures-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang-nursery/futures-rs/compare/0.1.27...0.1.28)

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

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index f4b0015..04140fa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,7 +39,7 @@ maud = { version = "0.20.0", features = ["actix-web"] }
 serde = { version = "1.0.92", features = ["derive"] }
 tar = "0.4.25"
 bytes = "0.4.12"
-futures = "0.1.27"
+futures = "0.1.28"
 libflate = "0.1.24"
 failure = "0.1.5"
 log = "0.4.6"