* Use golang's provided method names (gin)
This commit modifies the gin template for the router to leverage the http constants for method types as defined by RFC 7231 section 4.3. These are documented on:
https://golang.org/pkg/net/http/#pkg-constants
This removes the need for the `strings` dependency and does not require any new dependencies, as `net/http` is already imported.
* Remove strings dependency which is no longer used
* Update samples
* chore: add removing old files function to the scripts.
chore: add removing old files function to the scripts.
* docs: update by ./bin/go-gin-petstore-server.sh
* docs: update by ./bin/go-petstore-server.sh
* docs: update by ./bin/go-petstore-withxml.sh
* docs: update by ./bin/openapi3/go-petstore-server.sh
* docs: update by ./bin/security/go-petstore.sh
* Issue 1766 Modified mustache files for Go to support nullable in the spec v3.0+; Updated model files running .sh scripts for Go.
* Add "nullable" to fake yaml
* Add sample script for OAS3
* Fix output folder (openapi3)
* Run bin/openapi3/go-petstore.sh
* Update samples
* Update jaxrs-jersey
* Update python and php samples
* Add bin/openapi3/go-gin-petstore-server.sh
* Run bin/openapi3/go-gin-petstore-server.sh
* Update bin/openapi3/go-petstore-server.sh to generate "nullable" samples
* Run bin/openapi3/go-petstore-server.sh
* Fix duplicated `import`
* renmae Go post process file env variable
* add back samples/client/petstore/c/libcurl.licence
* keep go samples up-to-date
* update go petstore samples
* update go samples without formatting
* copy from go-server and add go-gin-server generator
* change the templates for the gin
* fix warnings of the golint tool
* fix the path of script
* add samples
* delete unnecessary comments (#1048)
* make the help message more appropriate (#1048)
* fix the link address format (#1048)
* minor improvement
