Update changelog

doc/pages/changelog.asciidoc

@@ -15,6 +15,15 @@ released versions.
 * `edit -scratch` with no buffer name will create a new
   scratch buffer with a unique autogenerated name.
 
+* `info -placement` is now `info -style` and supports
+  `menu` and `modal` additional styles.
+
+* `completions` option type `docstring` are now arbitrary
+  kakoune commands that are run on item select.
+
+* `InsertCompletionSelect` hook has been removed as
+  `completions` commands now provides a similar feature.
+
 == Kakoune 2019.01.20
 
 * `auto_complete` has been renamed to `autocomplete` for more

src/main.cc

@@ -47,6 +47,7 @@ struct {
         0,
         "» %file{...} expansions to read files\n"
         "» echo -to-file <filename> to write to file\n"
+        "» completions option have an on select command instead of a docstring\n"
     }, {
         20190120,
         "» named capture groups in regex\n"