Updated changelog

CHANGELOG.md

@@ -1,4 +1,4 @@
-# Pending Additions
+# v0.4.0
 
 - Update documentation theme to "Read the Docs"
 - [#429](https://github.com/helmholtz-analytics/heat/pull/429) Create submodule for Linear Algebra functions
@@ -27,6 +27,7 @@
 - [#534](https://github.com/helmholtz-analytics/heat/pull/534) `eye()` supports all 2D split combinations and matrix configurations.
 - [#535](https://github.com/helmholtz-analytics/heat/pull/535) Introduction of BaseEstimator and clustering, classification and regression mixins.
 - [#536](https://github.com/helmholtz-analytics/heat/pull/536) Getting rid of the docs folder
+- [#541](https://github.com/helmholtz-analytics/heat/pull/541) Introduction of basic halo scheme for inter-rank operations
 - [#558](https://github.com/helmholtz-analytics/heat/pull/558) `sanitize_memory_layout` assumes default memory layout of the input tensor
 - [#558](https://github.com/helmholtz-analytics/heat/pull/558) Support for PyTorch 1.5.0 added
 - [#562](https://github.com/helmholtz-analytics/heat/pull/562) Bugfix: split semantics of ht.squeeze()