Ship an own AnnAssign impl, that can be used to generate code for older pythons

def ourAnnAssign(target: ast.AST, value: ast.AST, annotation: ast.AST, useDedicatedSyntax: bool = False) -> OptAnnAssignT:
		if useDedicatedSyntax:
			return ast.AnnAssign(
				target=target,
				annotation=annotation,
				value=value,
				simple=1,
			)
		else:
			typeString = astor.to_source(ast, pretty_source="".join)
			return ast.Assign(targets=[target], value=value, type_comment=typeString)