chore(): changelog

Author: mhartington

CHANGELOG.md

@@ -1,3 +1,9 @@
+<a name="3.1.8"></a>
+## [3.1.8](https://github.com/ionic-team/ionic-app-scripts/compare/v3.1.7...v3.1.8) (2018-01-18)
+
+This release includes a bump in the version of node-sass. This adds support for node 9.
+
+
 <a name="3.1.7"></a>
 ## [3.1.7](https://github.com/ionic-team/ionic-app-scripts/compare/v3.1.6...v3.1.7) (2017-12-27)