v1.2.0

Bug fixes and Postgres Type-Casting Support

• Add cast support for Postgres (@ffxsam) 9dc1800, 829b2c1, 5cffe9e, 2149d83, f381d2a, cc8d292, bb1335c
• Fix falsey values being excluded from query #61 (@ffxsam) 7201833
• RDS Data API policy actions do not support resource-level permissions (@aiham) c07a4f5
• Add context to * permissions in IAM roles ff76e30
• Make engine config optional with default 1f26665