[docs] update changelog.

Author: NightShade256

CHANGELOG.md

@@ -2,9 +2,21 @@
 
 All changes to the crate will be documented here.
 
-## 0.1.0
+## v0.2.0
+
+### Changes
+
+- Changed `get_cols` and `set_cols` to require/return a `cty::c_int` instead
+  of a `i32`.
+
+### Additions
+
+- Added getters and setters for all the remaining fields.
+  The bindings can now be considered "feature complete".
+
+## v0.1.0
 
 Initial Release
 
-* Wraps the original widget in a rust-y way.
-* Supports getters and setters for most of the fields.
+- Wraps the original widget in a rust-y way.
+- Supports getters and setters for most of the fields.