dbplyr 2.1.1

• New support for Snowflake (@edgararuiz)

• compute(), sql_table_index(), and sql_query_wrap() now work with
  schemas (@mgirlich, #595).

• if_any() and if_all() are now translated.

• group_by() now ungroups when the dots argument is empty and .add is FALSE
  (@mgirlich, #615).

• sql_escape_date() and sql_escape_datetime gain methods for MS Access
  (@erikvona, #608).