Mustache 1.0.0 is shipped in mediawiki core. This is seriously out of date and should be bumped to 3.0.1. We'd like to update this.
There seems to be no major changes between Mustache 1.0.0 and 3.0.0 so this should not cause any problems, but consider this bug a heads up that this might happen within the next 2 months.
- resources/lib/foreign-resources.yaml has been updated to identify the new version
- Mustache 3.0.1 is shipped to users rather than the outdated 1.0