v0.4.0

Features

• Add the row_count_match() and col_count_match() validation methods by @rich-iannone (#24, #25)
• Add the col_vals_expr() validation method by @rich-iannone in #30
• Add the get_column_count() and get_row_count() functions by @rich-iannone in #23
• Add the preview() function by @rich-iannone in #20
• Incorporate row numbers to preview by @rich-iannone in #21
• Add option for info header in preview() table by @rich-iannone in #22

Fixes and Documentation

• Make corrections to step indexing by @rich-iannone in #26
• Improve visual display of rows_distinct() steps in validation report by @rich-iannone in #27
• In preview() function, make a copy of the input table by @rich-iannone in #29
• Use preview() with datasets throughout documentation by @rich-iannone in #28

Full Changelog: v0.3.0...v0.4.0