Merge pull request diesel-rs#1954 from kaj/ilike-in-changelog

Mention ilike in changelog.

Author: weiznich

CHANGELOG.md

@@ -36,6 +36,8 @@ for Rust libraries in [RFC #1105](https://github.com/rust-lang/rfcs/blob/master/
   example, if one of the fields has the type `Cow<'a, str>`). To define an
   association to such a type, write `#[belongs_to(parent = "User<'_>")]`
 
+* `Nullable<Text>` now supports `ilike` expression on  in PostgreSQL.
+
 ### Changed
 
 * Diesel's derives now require that `extern crate diesel;` be at your crate root