add CHANGELOG.md

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..f648abb
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# 0.1.0
+
+Initial Version of the library.
+
+- Includes the ability to extend `Equatable` and not have to override `==` and `hashCode`.