0.9

• ⚠️ BREAKING: Hook::bind (used internally by the bind! macro) now returns a concrete type Bound<_, _> instead of an impl Listener<_>. While this is a breaking change, upgrading from 0.8 shouldn't require any changes for most projects.
• Bound listeners are now Copy if the closure they're created from is also Copy.

  bind! {
      state:
  
      let reset = |_| *state = 0;
  }
  
  view! {
      // `reset` previously would be typed `impl Listener<_>`which made it `!Copy`
      <input onclick={reset} onchange={reset}>
  }

• Added a new kobold::diff::VString type: a versioned string drop-in replacement for a regular String. This type provides all the regular methods of a String via Deref and DerefMut traits, but it tracks mutable access by incrementing an internal version counter. This makes diffing &VString much faster and cheaper than &String or even &str in places where the ref keyword cannot be used.
• Added serde feature flag which implements Serialize and Deserialize traits from serde for VString.