update for release

CHANGES.md

@@ -1 +1,7 @@
-This release adds an `isNotBlank()` validation specifier, and fixes a bug where sanitizing `to()` a rule on a missing field raised a notice.
+This release adds new validation and sanitizing rules:
+
+- `lowerCase` for all-lower-case values
+- `upperCase` for all-upper-case values
+- `titleCase` for title-cased values
+- `lowerCaseFirst` for values where the first character is lower-case
+- `upperCaseFirst` for values where the first character is upper-case