Added specificationVersion to validate method output

Author: SahilChoudhary22

lib/schemapack.js

@@ -142,7 +142,8 @@ class SchemaPack {
     this.openapi = specParseResult.openapi;
     this.validated = true;
     this.validationResult = {
-      result: true
+      result: true,
+      specificationVersion: concreteUtils.version
     };
     return this.validationResult;
   }