This PR has supported block style scalars for deserialization.
Furthermore, unit test cases have also been added to ensure the deserialization of block style scalars works as it's expected.
coverage: 100.0%. remained the same
when pulling a12be9354bcd4c8a456cc6d80d0c2e5dfddab9b1 on feature/159_support_block_scalar_styles
into e99a12cbdc60c1d0c8aa5d718bb048647d1ec5af on develop.
This PR has supported block style scalars for deserialization.
Furthermore, unit test cases have also been added to ensure the deserialization of block style scalars works as it's expected.