Implement pure version of `todos` example :tada:

The `Widget` trait in `iced_pure` needed to change a bit to make the
implementation of `Element::map` possible.

Specifically, the `children` method has been split into `diff` and
`children_state`.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 1527c373..11966dd0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -91,6 +91,7 @@ members = [
     "examples/tour",
     "examples/url_handler",
     "examples/pure/counter",
+    "examples/pure/todos",
     "examples/websocket",
 ]