* changed files from rebuilding project and updating samples
* change default value of from_encoding to empty string
- from_encoding = NULL is invalid and produces an error, as only strings are allowed, see https://www.rdocumentation.org/packages/base/versions/3.6.2/topics/iconv
- defaulting to an empty string fixes this issue
* fix map being surrounded by quotes in json
* allow httr2 client to deal with empty response body
* changed files from rebuilding project and updating samples
* added PetMap schema for test of correct map serialization in toJSONString and regenerated samples
* add initial openapi config and java generated files
* add java implementation for adding generator version
* regenerate sample client files
* remove tabs
* only show generated version if build info exists
* set build info for batch generation
* update generator doc for new global flag
* use existing property for generator version
* update templates to include generator version
* update templates for better generator version syntax
* revert undesired changes
* regenerate samples for openapi client
* update templates to correct formatting/newlines
* correct description text and add to usage doc
* add generator cli option for all codegen types
* use more concise version info; update existing codegens to support new prop
* correct wrong prop reference
* add initial test coverage for new prop
* update last (scala) templates with new prop
* update samples after upstream merge
* use consistent version output
* use better sample project id/name
* revert using option for generator version in templates
