Bump ruby-prism to 1.9.0 (#828)

Author: reese

Cargo.lock

@@ -11,7 +11,7 @@ fancy-regex = "0.14.0"
 log = { version = "0.4.8", features = ["max_level_debug", "release_max_level_warn"] }
 memchr = "2.7"
 simplelog = "0.12"
-ruby-prism="1.8.0"
+ruby-prism="1.9.0"
 
 [target.'cfg(not(target_env = "msvc"))'.dependencies]
 tikv-jemallocator = { version = "0.6.1", features = ["disable_initial_exec_tls"], optional=true }