CHANGELOG.md in hash_math-1.0.0 vs CHANGELOG.md in hash_math-1.1.0

@@ -1,4 +1,18 @@
+# 1.1.0 (August 13t, 2020)
+
+Adding:
+
+* HashMath#Unpivot class and implementation.
+
+Removing:
+
+* Support for Ruby < 2.5
+
+# 1.0.0 (September 18th, 2019)
+
+Initial release.
+
 # 1.0.0-alpha (September 16th, 2019)
 
 Added initial implementation of:
 
 * HashMath::Matrix