Initialise all fields of TSParseOptions in tests
Initialise all fields of TSParseOptions in tests

This should prevent any confusing failures in the unit tests:

test/runtime/document_test.cc:381:7: warning: Passed-by-value struct argument contains uninitialized data (e.g., field: 'changed_range_count')
      ts_document_parse_with_options(document, options);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test/runtime/document_test.cc:408:7: warning: Passed-by-value struct argument contains uninitialized data (e.g., field: 'changed_range_count')
      ts_document_parse_with_options(document, options);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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