add release dates to news

Author: wkdavis

NEWS.md

@@ -1,15 +1,15 @@
-# rmddm 0.2.0
+# rmddm 0.2.0 (2019-07-23)
 
 * A Spanish version of the CRISP-DM report is now available. As a result, 
 `crispdm_report()` gains the new argument `language`. (@anthonySegura, #8)
 
-# rmddm 0.1.1
+# rmddm 0.1.1 (2018-01-29)
 
 * Added parameters to `crispdm_report()` to allow user to pass `file` and other argumens to `rmarkdown::draft()`
 * Added *Travis-CI* and *AppVeyor* integration
 * Added *codecov* integration
 
-# rmddm 0.1.0
+# rmddm 0.1.0 (2018-01-03)
 
 * Initial release of `rmddm`.