Do not change code under the valijson directory; it contains valijson source code from release v1.0.2.
To update, run the following command, then update the above commit for reference. 'master' can be replaced with the appropriate commit as desired.
git subtree pull -P src/Valijson/valijson https://github.com/tristanpenman/valijson.git master --squash
When committing the PR, DO NOT squash it. The two commits are needed as is to allow for future subtree pulls.