Bump yargs-parser from 13.1.1 to 13.1.2 in /examples/js-example

Bumps [yargs-parser](https://github.com/yargs/yargs-parser) from 13.1.1 to 13.1.2.
- [Release notes](https://github.com/yargs/yargs-parser/releases)
- [Changelog](https://github.com/yargs/yargs-parser/blob/master/docs/CHANGELOG-full.md)
- [Commits](https://github.com/yargs/yargs-parser/commits)

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