also bump rstar in geo

Author: frewsxcv

geo/Cargo.toml

@@ -17,7 +17,7 @@ travis-ci = { repository = "georust/geo" }
 [dependencies]
 num-traits = "0.2"
 serde = { version = "1.0", optional = true, features = ["derive"] }
-rstar = { version = "0.2" }
+rstar = { version = "0.4" }
 failure = "0.1.2"
 postgis = { version = "0.6", optional = true }
 proj = { version = "0.7", optional = true }