***$core:** Check if layout exists ([#1166](https://github.com/vuejs/vuepress/issues/1166)) ([38d1dea](https://github.com/vuejs/vuepress/commit/38d1dea))
***$core:**`NotFound` component doesn't work (close: [#1130](https://github.com/vuejs/vuepress/issues/1130)) ([b562972](https://github.com/vuejs/vuepress/commit/b562972))
***$core:** Mormalize override stylus file path in windows ([#1164](https://github.com/vuejs/vuepress/issues/1164)) ([9665196](https://github.com/vuejs/vuepress/commit/9665196))
***$core:** frontmatter attribute in `additionalPages` is ignored when combined with content (close: [#1157](https://github.com/vuejs/vuepress/issues/1157)) ([87894ff](https://github.com/vuejs/vuepress/commit/87894ff))
***$plugin-back-to-top:** use `$accent-color`. (close: [#1121](https://github.com/vuejs/vuepress/issues/1121)) ([#1122](https://github.com/vuejs/vuepress/issues/1122)) ([929da11](https://github.com/vuejs/vuepress/commit/929da11))
***$theme-default:** style is incompatible in low version iOS (<= iOS9) ([#1136](https://github.com/vuejs/vuepress/issues/1136)) ([f46de67](https://github.com/vuejs/vuepress/commit/f46de67))
***$plugin-google-analytics:** set `anonymizeIp` to true in order to be compliant with GDPR.([#1153](https://github.com/vuejs/vuepress/issues/1153)) ([122e024](https://github.com/vuejs/vuepress/commit/122e024))
***$theme-default:** semantic HTML (close: [#1154](https://github.com/vuejs/vuepress/issues/1154))([#1156](https://github.com/vuejs/vuepress/issues/1156)) ([ede57b0](https://github.com/vuejs/vuepress/commit/ede57b0))
