message: Document change in imports! macro
diff: @@ -708,3 +708,32 @@ impl WasmHash {
  The `Result`'s error has changed from `Error` to `DeserializeError`
  for the `decode` method.
  +
  +### imports!
  +
  +The imports macro does not support a callback as the first argument anymore.
  +
  +Before
  +
  +``````rust
  +let import_obj = imports! {
  + || { setup_context::<MockStorage, MockQuerier>(GAS_LIMIT) },
  + "env" => {
  + "db_read" => Func::new(|_a: u32| -> u32 { 0 }),
  + "db_write" => Func::new(|_a: u32, _b: u32| {}),
  + "db_remove" => Func::new(|_a: u32| {}),
  + },
  +};
  +````
  +
  +After:
  +
  +```rust
  +let import_obj = imports! {
  + "env" => {
  + "db_read" => Func::new(|_ctx: &mut Ctx, _a: u32| -> u32 { 0 }),
  + "db_write" => Func::new(|_ctx: &mut Ctx, _a: u32, _b: u32| {}),
  + "db_remove" => Func::new(|_ctx: &mut Ctx, _a: u32| {}),
  + },
  +};
  +```
  