Merge pull request #760 from lzutao/bump-dep

Bump cargo_metadata and directories dependencies

Author: RalfJung

Cargo.toml

@@ -34,8 +34,8 @@ required-features = ["rustc_tests"]
 
 [dependencies]
 byteorder = { version = "1.1", features = ["i128"]}
-cargo_metadata = { version = "0.7", optional = true }
-directories = { version = "1.0", optional = true }
+cargo_metadata = { version = "0.8", optional = true }
+directories = { version = "2.0", optional = true }
 rustc_version = { version = "0.2.3", optional = true }
 env_logger = "0.6"
 log = "0.4"