[2.7.0] - 2023-05-05

Added

• Spark app to diff files or tables and write result back to file or table. (#160)
• Add null value count to parquetBlockColumns and parquet_block_columns. (#162)
• Add parallelism argument to Parquet metadata methods. (#164)

Changed

• Change data type of column name in parquetBlockColumns and parquet_block_columns to array of strings.
  Cast to string to get earlier behaviour (string column name). (#162)