Bump serde_yaml from 0.8.20 to 0.8.21 (#1574)

Cargo.lock

@@ -1210,9 +1210,9 @@ dependencies = [
 
 [[package]]
 name = "serde_yaml"
-version = "0.8.20"
+version = "0.8.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad104641f3c958dab30eb3010e834c2622d1f3f4c530fef1dee20ad9485f3c09"
+checksum = "d8c608a35705a5d3cdc9fbe403147647ff34b921f8e833e49306df898f9b20af"
 dependencies = [
  "dtoa",
  "indexmap",

boa_tester/Cargo.toml

@@ -14,7 +14,7 @@ edition = "2018"
 Boa = { path = "../boa" }
 structopt = "0.3.23"
 serde = { version = "1.0.130", features = ["derive"] }
-serde_yaml = "0.8.20"
+serde_yaml = "0.8.21"
 serde_json = "1.0.67"
 bitflags = "1.3.2"
 regex = "1.5.4"