update minimum required compiletest version

Author: oli-obk

Cargo.toml

@@ -29,7 +29,7 @@ clippy_lints = { version = "0.0.104", path = "clippy_lints" }
 # end automatic update
 
 [dev-dependencies]
-compiletest_rs = "0.2.1"
+compiletest_rs = "0.2.5"
 lazy_static = "0.1.15"
 regex = "0.1.71"
 rustc-serialize = "0.3"