v0.5.0

• BREAKING: Removed c! and Fragment, instead children can be built using a tuple, e.g.

  h!(div).build((
    h!(h1).build("Hello"),
    h!(h2).build("World!")
  ))

• BREAKING: Removed Callable trait and PersistedCallback, only Callback and Void are left of the previous wasm_react::callback module and moved to wasm_react::Callback and wasm_react::Void. Callbacks can now be passed directly into props without persisting them with use_callback() first.

• BREAKING: Removed VNodeList, replaced by VNode. VNode is now an enum. VNode::empty() has been renamed to VNode::new().

• Added callback! macro to create Callback's which can clone-capture its environment.