Use overriden ls-types 0.17 with backported fix

Author: Xanewok

Cargo.lock

@@ -14,7 +14,7 @@ cargo = { git = "https://github.com/rust-lang/cargo" }
 env_logger = "0.4"
 failure = "0.1.1"
 jsonrpc-core = "8.0.1"
-languageserver-types = "0.17"
+languageserver-types = { git = "https://github.com/Xanewok/languageserver-types", branch = "backport-0.17-fix-params-types" }
 lazy_static = "0.2"
 log = "0.3"
 racer = "2.0.12"