v1.5.8

What's Changed

• No public description by @copybara-service[bot] in #257
• Rename by to split_by in Meterstick example implementations to make it consistent with the actual codes. by @copybara-service[bot] in #260
• Fix the behavior when deduping columns. It used to return alias_raw when there is an existing dup column but alias_raw is not always unique in one query. Now we also add suffix. Alias_raw + suffix is equivalent to the alias which is always unique in one query. by @copybara-service[bot] in #261
• Fix some lint issues. by @copybara-service[bot] in #262

Full Changelog: 1.5.7...1.5.8