Update changelog

Author: lukastaegert

CHANGELOG.md

@@ -5,9 +5,11 @@
 
 ### Bug Fixes
 * Do not show a TypeScript error when providing a location as number to this.warn and this.error (#2974)
+* Use the correct TypeScript type for Sourcemap.version (#2976)
 
 ### Pull Requests
 * [#2974](https://github.com/rollup/rollup/pull/2974): Align TS types, docs and implementation for this.warn and this.error (@lukastaegert)
+* [#2976](https://github.com/rollup/rollup/pull/2976): Fix sourcemap type and update dependencies (@lukastaegert)
 
 ## 1.16.3
 *2019-06-29*