Fix unescaped quotes in clj i18n strings

FieldLiterals on date fields should parse as dates [ci drivers]

Specifically this occurred when filtering on a field from a nested
query. The date string wasn't getting parsed as a date and just
getting passed as a string to the database causing a type mismatch.

Fixes #6988

Query cancellation

This commit adds query cancelling to the generic sql driver, Druid and
Presto. It cancels the future the query is running in which will
interrupt the query and allow any query cancellation logic to run. If
the database doesn't support query cancellation, or the necessary
information (i.e. query id) isn't available, the code will behave as
it did before.

Switch sql templates to an instaparse grammar [ci drivers]

This commit switches the SQL template parsing to a formally specified
EBNF grammar using instaparse. By specifying it in this way, changes
to the language become more flexible and explicit. This commit also
adds support for multiple parameters specified in an optional clause
as it's baked into the grammar.

Fixes #5492

Search widget [WIP]

Fix the transient failing api.dataset-test [ci drivers]

Also upgrade node in circle.yml to 8.9.0 LTS for trailing comma support

Merge branch 'dash-filter-search-widget' of github.com:metabase/metabase into dash-filter-search-widget

Also upgrade node in circle.yml to 8.9.0 LTS for trailing comma support

Fix Druid tests :(

Switch an expression agg test to use `non-timeseries-engines-with-feature`

Logical merge conflict. The code that was merged referenced a function
that was removed. Updating the test to use the new function.

Update NotFound.jsx

Update 10-pulses.md