v2.1.0

Features

• dbapi: add aborted transactions retry support (#168) (d59d502), closes #34 googleapis/python-spanner-django#544
• remove adding a dummy WHERE clause into UPDATE and DELETE statements (#169) (7f4d478)

Bug Fixes

• Add sqlparse dependency (#171) (e801a2e)

Reverts

• Revert "test: unskip list_backup_operations sample test (#170)" (#174) (6053f4a), closes #170 #174