fix #55

Author: sl-solution

CHANGELOG.md

@@ -4,11 +4,13 @@
 
 * Users now can choose between having the observations ids for the left data set and/or the right data set as part of the output data set.
 * Add a new function `eachgroup`. It allows iteration over each group of a grouped data set.
+* `op` is a new keyword argument for the `update/!` functions which allows passing a user defined function to control how the value of the main data set should be updated by the values from the transaction data set.
 
 ## Fixes
 
 * The `combine` function will now work fine when a view of data set is passed
 * For the join functions the `makeunique` argument is now passed correctly to the inside functions.
+* `update` and `update!` have the same `mode` option by default.
 
 # Version 0.7.0