updated changelog

Author: felipeZ

CHANGELOG.md

@@ -1,7 +1,9 @@
 ## [Unreleased]
 
-## [0.1.0] 06-09-2018
+## [0.1.0] 16-01-2020
 
 ### Added
 * First implementation using `f64`.
 * Used [nalgebra](https://github.com/rustsim/nalgebra) for the linear algebra operations. 
+* Both **GDJ** and **DPR** correction methods working.
+* Use a Trait to collect the methods that a matrix representation should have to compute the eigenvalue/eigenvectors.