Auto merge of #20246 - marmistrz:test-lifetime-handles, r=jdm

Use higher level handles from JS bindings

…reak servo

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix https://github.com/servo/rust-mozjs/issues/153

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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because this is just migration to a lifetimed API
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components/script/Cargo.toml

@@ -63,7 +63,7 @@ metrics = {path = "../metrics"}
 mitochondria = "1.1.2"
 mime = "0.2.1"
 mime_guess = "1.8.0"
-mozjs = { version = "0.5.0", features = ["promises"]}
+mozjs = { version = "0.6", features = ["promises"]}
 msg = {path = "../msg"}
 net_traits = {path = "../net_traits"}
 num-traits = "0.1.32"