Update changelog

CHANGELOG.md

@@ -1,5 +1,24 @@
 # Change log
 
+## v0.3.0
+
+Breaking Changes:
+
+* The constructor of datums like `Tokyo::new()` now returns `Result`.
+
+Added:
+
+* Made `ECEF` and `Ellipsoid` public.
+
+## v0.2.0
+
+Breaking Changes:
+
+* Removed crate level functions `from_jgd2000()`, `from_tokyo()` and `from_tokyo97()`. Use constructors like `Tokyo::new()` instead.
+* `LatLon::from_dms()` is replaced to `LatLon<Dms>::to_degrees()`.
+* `LatLon` functions `from_secs()`, `from_milli_secs()` and `from_micro_secs()` are replaced to `LatLon::map()` and operatorions like `/ 3600`.
+* Changed `LatLon` and `Dms` to tuple structs.
+
 ## v0.1.1
 
 Initial release.