Update cargo to a recent revision

Docs.rs currently stuck with openssl 0.7. This is only cargo revision
that is still using openssl 0.7 instead of 0.9.

Ref: #90

Author: onur

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "cratesfyi"
-version = "0.2.2"
+version = "0.2.3"
 authors = ["Onur Aslan <[email protected]>"]
 readme = "README.md"
 license = "MIT"
@@ -34,7 +34,7 @@ error-chain = "0.5"
 
 [dependencies.cargo]
 git = "https://github.com/rust-lang/cargo.git"
-rev = "02fed69e71806989a96ae372f5d0f7cbb9528c37"
+rev = "f6500c6b6480c89492773bff6d41c4abf6c5ee15"
 
 [dev-dependencies]
 tempdir = "0.3"