Update polars

Closes duckdb#314
Closes duckdb#315

Author: mlafeldt

Cargo.toml

@@ -39,9 +39,9 @@ libduckdb-sys = { version = "=1.3.0", path = "crates/libduckdb-sys" }
 num = { version = "0.4", default-features = false }
 num-integer = "0.1.46"
 pkg-config = "0.3.24"
-polars = "0.46"
-polars-arrow = "0.46"
-polars-core = "0.46"
+polars = "0.49.1"
+polars-arrow = "0.49.1"
+polars-core = "0.49.1"
 pretty_assertions = "1.4.0"
 prettyplease = "0.2.20"
 proc-macro2 = "1.0.56"