added changelog + es2015 entrypoint. version 1.0.3

Author: pjmolina

Diff for: README.md

@@ -4,6 +4,8 @@ Metadev Essential/Core library.
 
 Base clases for SDK for the meta-modeling framework **Essential**.
 
+See [Changelog](./changelog.md).
+
 ## Content
 
 Base clases and interfaces for:

Diff for: changelog.md

@@ -0,0 +1,7 @@
+# Changelog for @metadev/essential-core
+
+## Version 1.0.3
+
+2025.01.07
+
+- Add entrypoint `es2015` for helping Angular to select the ESM version instead the CommonJS version. (Source <https://github.com/angular/angular-cli/issues/19936>).