• feat(spanner): add support for NUMERIC data type (#2415)
• feat(spanner): add custom type support to spanner.Key (#2748)
• feat(spanner/spannertest): add support for bool parameter types (#2674)
• fix(spanner): update PDML to take sessions from pool (#2736)
• spanner/spansql: update docs on TableAlteration, ColumnAlteration (#2825)
• spanner/spannertest: support dropping columns (#2823)
• spanner/spannertest: implement GetDatabase (#2802)
• spanner/spannertest: fix aggregation in query evaluation for empty inputs (#2803)