* add group parameter support to php template
* more update for group parameter
* fix call to protect function
* fix missing $
* update based on feedback
* create fake endpoint to test group parameters
* sync fake petstore spec v2, v3
* fix php doc for group parameters
* update petstore samples
* update fake petstore spec v2
* update petstore samples
* fix spec and update samples
* fix float/double default value
* better code format
* better CI for openapi3 batch files (C# client)
* update nancyfx samples
* pipe output to /dev/null to reduce log size
* fix windows batch file
* add C# API client generated by OAS3 spec