Update Rust crate serde to v1.0.219

Author: renovate[bot]

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "adblock"
-version = "0.9.6"
+version = "0.9.5"
 authors = ["Anton Lazarev <[email protected]>", "Andrius Aucinas"]
 edition = "2021"
 
@@ -28,19 +28,19 @@ url = "2.5"
 percent-encoding = "2.1"
 once_cell = "1.8"
 regex = "1.5"
-bitflags = { version = "2.9.0", features = ["serde"] }
+bitflags = "1.3"
 itertools = "0.13"
 idna = "1.0.3"
 serde =  { version = "1.0", features = ["derive", "rc"] }
-seahash = "4.1.0"
+seahash = "3"   # seahash 4 introduces a breaking hash algorithm change
 memchr = "2.4"
-base64 = "0.22"
+base64 = "0.13"
 rmp-serde = "0.15"
+lifeguard = { version = "^ 0.6.1", optional = true }
 cssparser = { version = "0.29", optional = true }
 selectors = { version = "0.24", optional = true }
 serde_json = "1.0"
 thiserror = "1.0"
-flatbuffers = { version = "25.2.10", optional = true }
 
 [dev-dependencies]
 criterion = "0.5"
@@ -89,12 +89,12 @@ harness = false
 [features]
 # If disabling default features, consider explicitly re-enabling the
 # "embedded-domain-resolver" feature.
-default = ["embedded-domain-resolver", "full-regex-handling", "unsync-regex-caching"]
+default = ["embedded-domain-resolver", "full-regex-handling", "object-pooling", "unsync-regex-caching"]
 full-regex-handling = []
+object-pooling = ["lifeguard"] # disables `Send` and `Sync` on `Engine`.
 unsync-regex-caching = [] # disables `Send` and `Sync` on `Engine`.
 regex-debug-info = []
 css-validation = ["cssparser", "selectors"]
 content-blocking = []
 embedded-domain-resolver = ["addr"] # Requires setting an external domain resolver if disabled.
 resource-assembler = []
-flatbuffers-storage = [ "flatbuffers" ]