catchup changelog entries for #6, #12, #14.

README.md

@@ -149,6 +149,13 @@ hints with the [jq-sys] crate on how to link.
 
 ## v0.4.0 (Unreleased)
 
+Breaking Changes
+
+- Renamed crate from `json-query` to `jq-rs` ([#12]).
+- Adopted 2018 edition. The minimum supported rust version is now **1.32** ([#14]).
+- Output from jq programs now includes a trailing newline, just like the output
+  from the `jq` binary ([#6]).
+
 ## v0.3.1 ([2019-06-04](https://github.com/onelson/json-query/compare/v0.3.0..v0.3.1 "diff"))
 
 **Note: This is final release with the name [json-query].
@@ -193,4 +200,7 @@ Initial release.
 [#1]: https://github.com/onelson/json-query/issues/1
 [#3]: https://github.com/onelson/json-query/issues/3
 [#4]: https://github.com/onelson/json-query/issues/4
+[#6]: https://github.com/onelson/jq-rs/pull/6
 [#10]: https://github.com/onelson/json-query/issues/10
+[#12]: https://github.com/onelson/jq-rs/issues/12
+[#14]: https://github.com/onelson/jq-rs/issues/14