1.5.2

Added an Album table to the playground, along with some other improvements.

• 997 Fix type warnings in playground/commands/run.py by @dantownsend in #998
• 999 Add Album table to playground by @dantownsend in #1000

Fixed a bug with the output(load_json=True) clause, when used on joined tables.

• 1001 Fix load_json on joined tables by @dantownsend in #1002