CHANGELOG.md in h3-3.4.0

- old
+ new

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 # Change Log
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 The public API of this library consists of the functions declared in file
-[h3api.h](./src/h3lib/include/h3api.h).
+[h3api.h.in](./src/h3lib/include/h3api.h.in).
 
 ## [Unreleased]
+
+## [3.4.0] - 2019-01-23
+### Added
+- `getRes0Indexes` function for getting all base cells, and helper function `res0IndexCount` (#174)
+- Include defined constants for current library version (#173)
 
 ## [3.3.0] - 2018-12-25
 ### Added
 - `h3Line` and `h3LineSize` functions for getting the line of indexes between some start and end (inclusive) (#165)
 ### Changed