docs(CHANGELOG.md): notes for 0.1.6

Author: bennofs

CHANGELOG.md

@@ -1,9 +1,17 @@
-## 0.1.6 - [Unreleased]
+## 0.1.7 - [Unreleased]
 ### Added
 ### Fixed
 ### Changed
 ### Removed
 
+## 0.1.6
+### Added
+* support setting `NIX_INDEX_DATABASE` environment variable to set database location (#213), thanks @mmarx
+* this version and future versions will be published to https://crates.io, simplifying library usage in other projects
+### Fixed
+### Changed
+### Removed
+
 ## 0.1.5
 ### Added
 ### Fixed