Update changelog

Author: nikic

README.md

@@ -515,6 +515,8 @@ are listed.
 
 ### 60 (experimental)
 
+Supported since 0.1.7 (XXX).
+
 * `AST_FUNC_DECL` and `AST_METHOD` no longer generate a `uses` child. Previously this child was
   always `null`.
 * `AST_FUNC_CONST_ELEM` now always has a `docComment` child. Previously it was absent on PHP 7.0.

package.xml

@@ -23,7 +23,16 @@
  </stability>
  <license uri="https://github.com/nikic/php-ast/blob/master/LICENSE">BSD-3-Clause</license>
  <notes>
-- XXX
+- Added AST version 60 with the following changes:
+  - `AST_FUNC_DECL` and `AST_METHOD` no longer generate a `uses` child. Previously this child was
+    always `null`.
+  - `AST_FUNC_CONST_ELEM` now always has a `docComment` child. Previously it was absent on PHP 7.0.
+    On PHP 7.0 the value is always `null`.
+- Added `ARRAY_ELEM_REF` flag, which is used by `AST_ARRAY_ELEM` for by-reference array elements
+  and (since PHP 7.3) for by-reference destructuring. Previously this flag was represented simply
+  by the value `1`.
+- Deprecated AST versions 40 and 45.
+- Fix build against PHP 7.4-dev.
  </notes>
  <contents>
   <dir name="/">