This involves updating filter.js, mostly. The
tests were updated appropriately for this change,
which also involved changing a caspar test for
narrowing.
* In most cases, eslint --fix with the right comma-dangle settings was
able to update the code correctly.
* The exceptions were cases where the parser incorrectly treated the
arguments to functions as lists/objects and added commas; these are
detectable with linters, and we fixed manually. Since this is test
code, we can be reasonably confident that just fixing the failures
suffices to correct any bugs introduced by making changes
automatically.
Chaining together `wait*` functions can create race conditions in the
frontend tests. To avoid race condition, we need to insert `then`
function between two `wait*` functions.
Aditya Bansal
Tim Abbott
Cory Lynch
Raghav Jajodia
Robert Hönig
Umair Khan
Kartik Maji
Vishnu Ks