Basic support for casual; fixes #210

lib/class/Container.js

lib/core/traverse.js

lib/core/utils.js

lib/types/external.js

package.json

spec/schema/core/issues/chance-and-faker.json

ts/class/Container.ts

ts/core/traverse.ts

ts/core/utils.ts

ts/index.d.ts

ts/types/external.ts

yarn.lock