BUG FIXES
* Remove link for pipe documentation for simplicity.
* Fixed bug where using many `as.` functions (e.g., `as.Date()`, `as.character()`, `as.numeric()`) in a filter statement would fail. (218, 219)
MAINTENANCE
* Updated internal SQL translation to use `DBI` S4 generics (`DBI::dbQuoteIdentifier()` is now used instead of
`dbplyr::sql_escape_ident()` and `DBI::dbQuoteString()` instead of `dbplyr::sql_escape_string()`), to comply
with upcoming `dbplyr` 2.0 release (225, 225; https://github.com/tidyverse/dbplyr/issues/385)
* Wrapped all examples that call web resources in `try()` to avoid spurious check failures (229).