Auto merge of #443 - CYBAI:getpromiseishandled, r=jdm

Introduce GetPromiseIsHandled

Expose `GetPromiseIsHandled` API to `rust-mozjs`.

This would be used in servo/servo#20755 for the step 4.1.1 for the spec of [notify about rejected promises](https://html.spec.whatwg.org/multipage/webappapis.html#notify-about-rejected-promises).

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/rust-mozjs/443)
<!-- Reviewable:end -->

Author: bors-servo

Cargo.toml

@@ -2,7 +2,7 @@
 name = "mozjs"
 description = "Rust bindings to the Mozilla SpiderMonkey JavaScript engine."
 repository = "https://github.com/servo/rust-mozjs"
-version = "0.9.2"
+version = "0.9.3"
 authors = ["The Servo Project Developers"]
 build = "build.rs"
 license = "MPL-2.0"
@@ -48,4 +48,4 @@ lazy_static = "1"
 libc = "0.2"
 log = "0.4"
 num-traits = "0.2"
-mozjs_sys = "0.61.0"
+mozjs_sys = "0.61.1"

src/jsapi_wrappers.in

@@ -68,6 +68,7 @@ wrap!(jsapi: pub fn IsPromiseObject(obj: HandleObject) -> bool);
 wrap!(jsapi: pub fn GetPromiseState(promise: HandleObject) -> PromiseState);
 wrap!(jsapi: pub fn GetPromiseID(promise: HandleObject) -> u64);
 wrap!(jsapi: pub fn GetPromiseResult(promise: HandleObject) -> Value);
+wrap!(jsapi: pub fn GetPromiseIsHandled(promise: HandleObject) -> bool);
 wrap!(jsapi: pub fn GetPromiseAllocationSite(promise: HandleObject) -> *mut JSObject);
 wrap!(jsapi: pub fn GetPromiseResolutionSite(promise: HandleObject) -> *mut JSObject);
 wrap!(jsapi: pub fn CallOriginalPromiseResolve(cx: *mut JSContext, resolutionValue: HandleValue) -> *mut JSObject);