deps: Update rbs to 3.0 (#662)

* deps: Update rbs to 3.0

* spec: Use fileutils for testing Solargraph::Rbs::StdlibMap

The "set" has been merged into the Ruby Core and RBS has been drop
support since v3.0.  So current spec implementation will not work with
RBS-3.x.

lib/solargraph/rbs_map/conversions.rb

@@ -40,7 +40,7 @@ def convert_decl_to_pin decl, closure
         when RBS::AST::Declarations::Interface
           # STDERR.puts "Skipping interface #{decl.name.relative!}"
           interface_decl_to_pin decl
-        when RBS::AST::Declarations::Alias
+        when RBS::AST::Declarations::TypeAlias
           type_aliases[decl.name.to_s] = decl
         when RBS::AST::Declarations::Module
           module_decl_to_pin decl
@@ -222,12 +222,12 @@ def method_def_to_pin decl, closure
       # @param decl [RBS::AST::Members::MethodDefinition]
       # @param pin [Pin::Method]
       def method_def_to_sigs decl, pin
-        decl.types.map do |type|
-          parameters, return_type = parts_of_function(type, pin)
-          block = if type.block
-            Pin::Signature.new(*parts_of_function(type.block, pin))
+        decl.overloads.map do |overload|
+          parameters, return_type = parts_of_function(overload.method_type, pin)
+          block = if overload.method_type.block
+                    Pin::Signature.new(*parts_of_function(overload.method_type.block, pin))
           end
-          return_type = ComplexType.try_parse(method_type_to_tag(type))
+          return_type = ComplexType.try_parse(method_type_to_tag(overload.method_type))
           Pin::Signature.new(parameters, return_type, block)
         end
       end

solargraph.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'observer', '~> 0.1'
   s.add_runtime_dependency 'ostruct', '~> 0.6'
   s.add_runtime_dependency 'parser', '~> 3.0'
-  s.add_runtime_dependency 'rbs', '~> 2.0'
+  s.add_runtime_dependency 'rbs', '~> 3.0'
   s.add_runtime_dependency 'reverse_markdown', '~> 2.0'
   s.add_runtime_dependency 'rubocop', '~> 1.38'
   s.add_runtime_dependency 'thor', '~> 1.0'

spec/rbs_map/stdlib_map_spec.rb

@@ -1,7 +1,7 @@
 describe Solargraph::RbsMap::StdlibMap do
   it "finds stdlib require paths" do
-    rbs_map = Solargraph::RbsMap::StdlibMap.load('set')
-    pin = rbs_map.path_pin('Set#add')
+    rbs_map = Solargraph::RbsMap::StdlibMap.load('fileutils')
+    pin = rbs_map.path_pin('FileUtils#chdir')
     expect(pin).to be
   end