Prepare changelog for 0.13.0

changelog.yml

@@ -1,17 +1,31 @@
 ---
-- version: unreleased
+- version: 0.13.0
   summary:
-  date:
+  date: '2021-09-12'
   fixed:
-    - 'Fix `ArgumentError` for classes including `Dry::Configurable` whose
-      `initializer` has required kwargs. (#113 by @timriley)'
-    - 'Remove implicit `to_hash` conversion from `Config`. (#114 by @timriley)'
+    - Fixed `ArgumentError` for classes including `Dry::Configurable` whose `initializer` has required kwargs. (#113 by @timriley)
   added:
+    - |-
+      Added flags to determine whether to warn on the API usage deprecated in this release (see "Changed" section below). Set these to `false` to suppress the warnings. (#124 by @timriley)
+
+        ```ruby
+        Dry::Configurable.warn_on_setting_constructor_block = false
+        Dry::Configurable.warn_on_setting_positional_default = false
+        ```
   changed:
-    - 'Deprecate constructor as a block. Providing `constructor:` kwarg is now
-      the only accepted way. (#111 by @waiting-for-dev & @timriley)'
-    - 'Use `default:` kwarg instead of second positional argument for the
-      default value. (#112 by @waiting-for-dev & @timriley)'
+    - |-
+      Deprecated the setting constructor provided as a block. Provide it via the `constructor:` keyword argument instead. (#111 by @waiting-for-dev & @timriley)
+
+        ```ruby
+        setting :path, constructor: -> path { Pathname(path) }
+        ```
+    - |-
+      Deprecated the setting default provided as the second positional argument. Provide it via the `default:` keyword argument instead. (#112 and #121 by @waiting-for-dev & @timriley)
+
+        ```ruby
+        setting :path, default: "some/default/path"
+        ```
+    - '[BREAKING] Removed implicit `to_hash` conversion from `Config`. (#114 by @timriley)'
 - version: 0.12.1
   summary:
   date: '2021-02-15'