JSONSchema Testsuite active and pharo9

From this release on JSONSchema will be checked with the official test suite to check completeness of JSONSchema. Current state is over 400 hundred tests of over 1100 tests suceed. From here we can work towards completing the spec. Builds for pharo9 have been enabled

Added support for small missing things

0.3

a lot of little tweaks

Basic functionality

This version includes reading a spec, writing a spec and processing basic types like numbers, strings (with formats), objects and arrays. Constraints model has been added to limit the values of some primitive types.

Factored out of OpenAPI

This release is moved from OpenAPI and refactored to meet JSON Schema requirements