Update agent dependencies

Author: renovate-bot

Cargo.toml

@@ -13,7 +13,7 @@ name = "redirectionio"
 crate-type = ["staticlib", "cdylib", "rlib"]
 
 [build-dependencies]
-cbindgen="0.20.0"
+cbindgen="0.21.0"
 libtool = "0.1.1"
 linked_hash_set = { version = "0.1.4", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
@@ -28,16 +28,16 @@ console_log = "0.2.0"
 heck = "0.4.0"
 http = "0.2.6"
 lazy_static = "1.4.0"
-libc = "0.2.119"
-log = "0.4.14"
+libc = "0.2.121"
+log = "0.4.16"
 percent-encoding = "2.1.0"
 rand = "0.8.5"
 regex = "1.5.5"
 scraper = "0.12.0"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0.79"
 stderrlog = "0.5.1"
-string_cache = "=0.8.1"
+string_cache = "=0.8.4"
 url = "2.2.2"
 uuid = { version = "0.8", features = ["serde", "v4"] }