Update CHANGELOG.md

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 All notable changes to `statistics` will be documented in this file.
 
-## 0.0.1 - WIP
+## 0.1.0 - 2022-01-08
+
+Initial release with:
+- getMean()
+- getCount()
+- getMedian()
+- getLowerPercentile()
+- getHigherPercentile()
+- getMode()
+- getFrequencies(): a frequency is the number of times a value of the data occurs;
+- getRelativeFrequencies(): a relative frequency is the ratio (fraction or proportion) of the number of times a value of the data occurs in the set of all outcomes to the total number of outcomes;
+- getCumulativeFrequences(): is the accumulation of the previous relative frequencies.;
+- getCumulativeRelativeFrequencies(): is the accumulation of the previous relative ratio.
+
 
-- initial release