v0.19.4

0.19.4 (2022-04-06)

Bug Fixes

• Add spark to lambda dockerfile (#2480) (ba22c28)
• Don't prevent apply from running given duplicate empty names in data sources. Also fix repeated apply of Spark data source. (#2415) (88e01a2)
• Fix DataSource constructor to unbreak custom data sources (#2492) (2115bd0)