Make Widget::size like toss::AsyncWidget::size

Cargo.lock

@@ -68,6 +68,17 @@ version = "1.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7de8ce5e0f9f8d88245311066a578d72b7af3e7088f32783804676302df237e4"
 
+[[package]]
+name = "async-recursion"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e97ce7de6cf12de5d7226c73f5ba9811622f4db3a5b91b55c53e987e5f91cba"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.13",
+]
+
 [[package]]
 name = "async-trait"
 version = "0.1.68"
@@ -240,6 +251,7 @@ name = "cove"
 version = "0.6.1"
 dependencies = [
  "anyhow",
+ "async-recursion",
  "async-trait",
  "clap",
  "cookie",