ast: add Node#deconstruct, fix hash

gems/ast/2.4/_test/test.rb

@@ -5,6 +5,7 @@ def Symbol!(_) end
 def Array!(_) end
 def Node!(_) end
 def Bool!(_) end
+def Integer!(_) end
 
 # AST::Node
 
@@ -13,7 +14,7 @@ def Bool!(_) end
 AST::Node.new(:x, [:foo, 42], { y: 1 })
 
 Array!  node1.children
-String! node1.hash
+Integer! node1.hash
 Symbol! node1.type
 Bool!   node1 == node2
 Node!   node1.append 42
@@ -24,6 +25,7 @@ def Bool!(_) end
 Node!   node1.to_ast
 String! node1.to_sexp
 Array!  node1.to_sexp_array
+Array!  node1.deconstruct
 Node!   node1.updated
 Node!   node1.updated(:foo)
 Node!   node1.updated(:foo, [])

gems/ast/2.4/_test/test.rbs

@@ -4,6 +4,7 @@ module Kernel
   def Array!: (Array[untyped]) -> void
   def Node!: (AST::Node) -> void
   def Bool!: (bool) -> void
+  def Integer!: (Integer) -> void
 end
 
 class X

gems/ast/2.4/ast.rbs

@@ -11,7 +11,7 @@ module AST
     public
 
     attr_reader children: Array[untyped]
-    attr_reader hash: String
+    attr_reader hash: Integer
     attr_reader type: Symbol
 
     alias + concat
@@ -26,6 +26,8 @@ module AST
 
     def concat: (_ToA[untyped] array) -> self
 
+    def deconstruct: () -> Array[untyped]
+
     def dup: () -> self
 
     def eql?: (untyped other) -> bool