Update RBI files for msgpack.

Library/Homebrew/sorbet/rbi/gems/msgpack@1.5.2.rbi

@@ -1,4 +1,4 @@
-# typed: true
+# typed: false
 
 # DO NOT EDIT MANUALLY
 # This is an autogenerated file for types exported from the `msgpack` gem.
@@ -58,15 +58,15 @@ end
 module MessagePack
   private
 
-  def dump(v, *rest); end
+  def dump(v, io = T.unsafe(nil), options = T.unsafe(nil)); end
   def load(src, param = T.unsafe(nil)); end
-  def pack(v, *rest); end
+  def pack(v, io = T.unsafe(nil), options = T.unsafe(nil)); end
   def unpack(src, param = T.unsafe(nil)); end
 
   class << self
-    def dump(v, *rest); end
+    def dump(v, io = T.unsafe(nil), options = T.unsafe(nil)); end
     def load(src, param = T.unsafe(nil)); end
-    def pack(v, *rest); end
+    def pack(v, io = T.unsafe(nil), options = T.unsafe(nil)); end
     def unpack(src, param = T.unsafe(nil)); end
   end
 end
@@ -75,8 +75,6 @@ module MessagePack::CoreExt
   def to_msgpack(packer_or_io = T.unsafe(nil)); end
 end
 
-MessagePack::DEFAULT_EMPTY_PARAMS = T.let(T.unsafe(nil), Hash)
-
 class MessagePack::ExtensionValue < ::Struct
   include ::MessagePack::CoreExt
 
@@ -92,11 +90,38 @@ class MessagePack::Factory
   def dump(v, *rest); end
   def load(src, param = T.unsafe(nil)); end
   def pack(v, *rest); end
+  def pool(size = T.unsafe(nil), **options); end
   def registered_types(selector = T.unsafe(nil)); end
   def type_registered?(klass_or_type, selector = T.unsafe(nil)); end
   def unpack(src, param = T.unsafe(nil)); end
 end
 
+class MessagePack::Factory::Pool
+  def initialize(factory, size, options = T.unsafe(nil)); end
+
+  def dump(object); end
+  def load(data); end
+end
+
+class MessagePack::Factory::Pool::AbstractPool
+  def initialize(size, &block); end
+
+  def checkin(member); end
+  def checkout; end
+end
+
+class MessagePack::Factory::Pool::PackerPool < ::MessagePack::Factory::Pool::AbstractPool
+  private
+
+  def reset(packer); end
+end
+
+class MessagePack::Factory::Pool::UnpackerPool < ::MessagePack::Factory::Pool::AbstractPool
+  private
+
+  def reset(unpacker); end
+end
+
 class MessagePack::Packer
   def registered_types; end
   def type_registered?(klass_or_type); end