Add URI Decoding to getRefObject.

lib/util.js

@@ -1205,9 +1205,11 @@ module.exports = {
     savedSchema = $ref.split('/').slice(1).map((elem) => {
       // https://swagger.io/docs/specification/using-ref#escape
       // since / is the default delimiter, slashes are escaped with ~1
-      return elem
+      return decodeURIComponent(
+        elem
           .replace(/~1/g, '/')
-        .replace(/~0/g, '~');
+          .replace(/~0/g, '~')
+      );
     });
     // at this stage, savedSchema is [components, part1, parts]
     // must have min. 2 segments after "#/components"

test/data/valid_openapi/petstore-expanded.yaml

@@ -230,6 +230,7 @@ paths:
           stype: form
           schema:
             $ref: '#/components/parameters/Tuhin'
+        - $ref: '#/paths/~1pets~1%7Bid%7D/get/parameters/0'
     servers:
       - url:  https://{username}.gigantic-server.com:{port}/{basePath}
         description: Common url for all operations in this path