Replace type Point and SourceByteRange with BytePoint and ByteRange

Author: kngwyu

Cargo.lock

@@ -28,6 +28,8 @@ env_logger = "0.5"
 clap = "2.19"
 lazy_static = "1.0"
 humantime = "1.1"
+derive_more = "0.11.0"
+rls-span = "0.4.0"
 
 [dev-dependencies]
 racer-testutils = { path = "testutils" }