…reak servo
<!-- Please describe your changes on the following line: -->
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<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [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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Source-Repo: https://github.com/servo/servo
Source-Revision: 914952487bcbba0a31db8aefc4a9487903721959
