Allow global OpenAPISnippets variable to redefined

• Allow global OpenAPISnippets variable to redefined - thanks to @povilass for the issue, and @joe642 for the fix!

Support for schema references in query parameter definitions

• Adds support for resolving schema references in query parameter definitions (see #39) - Thanks to @vpillinger!

v0.7.1: Merge pull request #34 from andrzejwp/patch-2

• Do not require scheme property when using API key (#34) - Thanks to @andrzejwp!

v0.6.1: Update version number

• Fixed handling of relative '$ref' values (thanks to this PR from @Brian-Kavanagh)
• Updated dependencies to remove vulnerability

Thank you for the contributions!

v0.6.0

• Use openapi-sampler for complex example data (thanks to this PR from @mllrjb)
• First support for OpenAPI v3.0.x (thanks to this PR from @gugu)

Thank you for the contributions!