Fix some load errors related to different gem versions being available (

#184)

* Fix some load errors

- Ensure we utilize the wrapper for `load_yaml` to deal with aliases properly
- Utilize `JSON::Validator.parse` as it handles MultiJson and other inconsistencies

* Handle JSON::Schema::JsonParseError being thrown

lib/dip/config.rb

@@ -120,15 +120,17 @@ def validate
       schema_path = File.join(File.dirname(__FILE__), "../../schema.json")
       raise Dip::Error, "Schema file not found: #{schema_path}" unless File.exist?(schema_path)
 
-      data = YAML.load_file(file_path)
-      schema = JSON.parse(File.read(schema_path))
+      data = self.class.load_yaml(file_path)
+      schema = JSON::Validator.parse(File.read(schema_path))
       JSON::Validator.validate!(schema, data)
     rescue Psych::SyntaxError => e
       raise Dip::Error, "Invalid YAML syntax in config file: #{e.message}"
     rescue JSON::Schema::ValidationError => e
       data_display = data ? data.to_yaml.gsub("\n", "\n  ") : "nil"
       error_message = "Schema validation failed: #{e.message}\nInput data:\n  #{data_display}"
       raise Dip::Error, error_message
+    rescue JSON::Schema::JsonParseError => e
+      raise Dip::Error, "Error parsing schema file: #{e.message}"
     end
 
     private