added extrema to readme

mkborregaard · mkborregaard · commit 22699408de88 · 2017-05-23T15:44:46.000+02:00
diff --git a/README.md b/README.md
@@ -16,6 +16,7 @@ The following functions are implemented:
 sum
 maximum
 minimum
+extrema
 mean
 var
 std

-Original file line number
+Diff line change
 sum
 maximum
 minimum
 +extrema
 mean
 var
 std