message: Bump version in `README`
diff: @@ -66,7 +66,7 @@ __Iced is currently experimental software.__ [Take a look at the roadmap],
  Add `iced` as a dependency in your `Cargo.toml`:
  ```toml
  -iced = "0.3"
  +iced = "0.4"
  ```
  __Iced moves fast and the `master` branch can contain breaking changes!__ If
  @@ -215,7 +215,7 @@ $ cargo run --features iced/glow --package game_of_life
  and then use it in your project with
  ```toml
  -iced = { version = "0.3", default-features = false, features = ["glow"] }
  +iced = { version = "0.4", default-features = false, features = ["glow"] }
  ```
  **NOTE:** Chances are you have hardware that supports at least OpenGL 2.1 or OpenGL ES 2.0,
  