Cargo.toml in faster_path-0.2.1 vs Cargo.toml in faster_path-0.2.2

@@ -11,7 +11,8 @@
 [lib]
 name = "faster_path"
 crate-type = ["dylib"]
 
 [dependencies]
+ruby-sys = "0.2.20"
 ruru = "0.9.3"
 array_tool = "0.4.1"