Bump failure from 0.1.6 to 0.1.7

Bumps [failure](https://github.com/rust-lang-nursery/failure) from 0.1.6 to 0.1.7.
- [Release notes](https://github.com/rust-lang-nursery/failure/releases)
- [Changelog](https://github.com/rust-lang-nursery/failure/blob/master/RELEASES.md)
- [Commits](https://github.com/rust-lang-nursery/failure/commits)

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

Author: dependabot-preview[bot]

Cargo.lock

@@ -13,7 +13,7 @@ edition = "2018"
 path = "./traits.rs"
 
 [dependencies]
-failure = "0.1.6"
+failure = "0.1.7"
 gimli = { version = "0.20.0", optional = true, default-features = false, features = ["std", "read"] }
 wasmparser = "0.35.3"
 twiggy-ir = { version = "=0.6.0", path = "../ir" }

traits/Cargo.toml

@@ -17,7 +17,7 @@ name = "twiggy"
 path = "./twiggy.rs"
 
 [dependencies]
-failure = "0.1.6"
+failure = "0.1.7"
 structopt = "0.3"
 twiggy-analyze = { version = "=0.6.0", path = "../analyze" }
 twiggy-ir = { version = "=0.6.0", path = "../ir" }