Re: [w3c/IndexedDB] Status report and planning for TPAC 2021 (#364)

Oops, past the deadline for specification status report. Here we go...

# Specification Status Report - TPAC 2021

## Progress in the last 12 months

Extremely limited progress. Implementers appear to be focusing elsewhere (e.g. [Storage Foundation](https://github.com/WICG/storage-foundation-api-explainer) and [Access Handles](https://github.com/WICG/file-system-access/blob/main/AccessHandle.md)). Google Chrome does plan to invest more in Indexed DB performance in 2022, and plans to explore if new indexing-related functionality could help developers migrate APIs 

Normative changes:
* Correct assertion that a transaction's scope is a "set of object stores" that is "fixed for the lifetime of that transaction", which is not true for upgrade transactions.

Editorial updates:
* Use sorting definitions from [infra](https://infra.spec.whatwg.org/)
* Textual simplifications, e.g. drop "running" from algorithm invocation

Implementer updates:
* Safari 14 supports `databases()`

Updated discussion / issues:
* Renewed interest in support for boolean keys #76 
* At TPAC 2019 we discussed `putAll()` for batch population of stores. 
  * Initial implementation experiments in Chrome showed no meaningful performance improvement, although we don't have high confidence in the results and would welcome other implementer feedback. #69 
  * Following Chrome's pause of work on putAll(), there was more discussion about pre-filling stores with JSON #224 
* More support expressed for a `closed` property on database connections. #333 
* More discussion about explicit control over transaction lifetimes #34
* Requests for editorial changes - _PRs welcome!_
  * Rename "array key" to "composite key" (filed by the editor)? #360
  * Clarify that consistency model is strict serializability #355 
  * Clarify that IDBTransaction.onerror fires when errors bubble up from requests #353 
  * Clarify queueing behavior when opening a database #354

Miscellaneous:
* Migrated from Travis-CI to GitHub Actions

## Moving to CR?

* Need to go to FPWD first. #268 - I think we've all been busy.
* Set of normative changes since v2 is still fairly minimal [revision history](https://w3c.github.io/IndexedDB/#revision-history)

## See also

* 2020 update #338
* 2019 update #290

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