feat: bump flagsmith-flag-engine to enable IN operator

Author: khvn26

Cargo.toml

@@ -22,7 +22,7 @@ chrono = { version = "0.4"}
 log = "0.4"
 flume = "0.10.14"
 
-flagsmith-flag-engine = "0.2.0"
+flagsmith-flag-engine = "0.3.0"
 
 [dev-dependencies]
 httpmock = "0.6"