fix: Update to use JSON.parse over JSON.load (#99)

Author: arothian

lib/cfn-model/parser/cfn_parser.rb

@@ -110,7 +110,7 @@ def process_conditions(cfn_hash, cfn_model, condition_values_json)
       if condition_values_json.nil?
         condition_values = {}
       else
-        condition_values = JSON.load condition_values_json
+        condition_values = JSON.parse condition_values_json
       end
 
       cfn_hash['Conditions'].each do |condition_key, _|

lib/cfn-model/parser/parameter_substitution.rb

@@ -9,7 +9,7 @@ class ParameterSubstitution
 
   def apply_parameter_values(cfn_model, parameter_values_json)
     unless parameter_values_json.nil?
-      parameter_values = JSON.load parameter_values_json
+      parameter_values = JSON.parse parameter_values_json
       if is_aws_format?(parameter_values)
         parameter_values = convert_aws_to_legacy_format(parameter_values)
       elsif !is_legacy_format?(parameter_values)