Add psych as dependency and fix schema load on psych >= 4.0.1 (#1685)

* Add psych as dependency and fix schema load on psych >= 4.0.1

From version 4 psych, has changed the API for load_safe.

Resolves #1684

* Ensure we use proper syntax of safe_load based on the psych version

Since ruby 1.9.2 psych is a part of ruby MRI.
From ruby 3.1.0 it comes with psych 4.0.1, which introduced a braking change into safe_load method. Ruby 3.2.0 comes with psych 5.0.1

refs:
- https://www.ruby-lang.org/en/news/2021/12/25/ruby-3-1-0-released/
- https://www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-released/

lib/active_graph/tasks/migration.rake

@@ -83,7 +83,11 @@ COMMENT
 
       args.with_defaults(remove_missing: false)
 
-      schema_data = YAML.safe_load(File.read(SCHEMA_YAML_PATH), [Symbol])
+      schema_data = if Gem::Requirement.new(">= 4.0.1") =~ Gem::Version.new(Psych::VERSION)
+        YAML.safe_load(File.read(SCHEMA_YAML_PATH), permitted_classes: [Symbol])
+      else
+        YAML.safe_load(File.read(SCHEMA_YAML_PATH), [Symbol])
+      end
 
       ActiveGraph::Base.subscribe_to_query(&method(:puts))