message: Update CHANGELOG.md with a 2.3.0 section mentioning the breaking change in FacetFilter
diff: +# 2.3.0 (28th November, 2017)
  +
  +- Breaking change in FacetFilter in commit: [d7f9eab70bc9b87f91f2122ecf1667a13f1b6a0e](https://github.com/searchkit/searchkit/commit/d7f9eab70bc9b87f91f2122ecf1667a13f1b6a0e)
  + ```
  + Non String agg type fix (#536)
  +
  + * make FacetAccessor namespaced by id like all others
  +
  + * Fix numeric/boolean values for aggs
  +
  + - cast bucket keys to strings
  + - fix FacetFilter use of field as key(breaking change)
  + - Accessor throws better error when using same id on imcompatible component
  + - fix e2e apps
  +
  + * gen bundle
  +
  + * add id change to TagFilter docs
  + ```
  + the key used was changed from `filter` to `id` here: https://github.com/searchkit/searchkit/commit/d7f9eab70bc9b87f91f2122ecf1667a13f1b6a0e#diff-f172a23508b6de00b38c007df825d91a
  +
  # 2.2.0 (20th August, 2017)
  - Passing credentials in the request (#481)
  