Destructuring not recognized

Hi,

I've encountered a case where Polyester.jl does not know how to handle the destructuring syntax introduced in Julia 1.7:

```julia
using Polyester

struct A
a
b
end

x = A(1,2)

Threads.@threads for i in 1:2
(; a, b) = x
end

@batch for i in 1:2
(; a, b) = x
end
```

The `@batch` loop returns
```
ERROR: LoadError: "Don't know how to handle:\n \$(Expr(:parameters, :a, :b))"
```