databases/R-RSQLite: Update to 2.1.1

Notable changes since 1.0.0:

- RSQLite has been rewritten (essentially from scratch) in C++ with
  Rcpp.
- You can now use SQLite窶冱 URL specification for databases.
- Queries, query parameters and table data are always converted to
  UTF-8 before being sent to the database.
- New strategy for prepared queries. Create a prepared query with
  dbSendQuery() or dbSendStatement() and bind values with dbBind().
- dbSendQuery(), dbGetQuery(), dbSendStatement() and dbExecute() also
  support inline parameterised queries.
- Improve column type inference.
- dbFetch() uses the same row name strategy as dbReadTable().
- dbColumnInfo() will now return information even before you窶况e
  retrieved any data.
- New sqliteVersion() prints the header and library versions of
  RSQLite.
- Deprecation warnings are given only once, with a clear reference to
  the source.
- datasetsDb() now returns a read-only database, to avoid
  modifications to the installed file.
- Values of class "integer64" are now supported for dbWriteTable() and
  dbBind().
- New connections now automatically load default RSQLite extensions.
- Implement dbUnquoteIdentifier().

(minskim)