fix: Bump lru to 0.18.2 for RUSTSEC-2026-0253 (#206)

Author: JackDanger

launchdarkly-server-sdk/Cargo.toml

@@ -24,7 +24,7 @@ eventsource-client = { version = "0.18.0" }
 launchdarkly-sdk-transport = { version = "0.1.0" }
 futures = "0.3.12"
 log = "0.4.14"
-lru = { version = "0.16.3", default-features = false }
+lru = { version = "0.18.2", default-features = false }
 # Pulled without default features so that the float-roundtrip feature below is what decides
 # whether the evaluation engine parses floats the way Go does.
 launchdarkly-server-sdk-evaluation = { version = "2.2.1", default-features = false }