ember-cli-version-checker deprecation warning

Your version of ember-cli-version-checker needs to be updated to prevent the following deprecation warning in Ember 2.18.x:

```
DEPRECATION: An addon is trying to access project.nodeModulesPath. This is not a reliable way to discover npm modules. Instead, consider doing: require("resolve").sync(something, { basedir: project.root }). Accessed from: new NPMDependencyVersionChecker (/Users/me/git/my-ember-addon/node_modules/ember-remarkable/node_modules/ember-cli-version-checker/src/npm-dependency-version-checker.js:11:33)
```