Breaking changes, minor adjustments

release notes/v0.54.0.md

@@ -1,13 +1,12 @@
 k6 `v0.54.0` is here 🎉! This release includes:
 
-- (_optional_) `<highlight of breaking changes>`
-- `<Summary of new features>` (_one or multiple bullets_)
-
+- A new experimental CSV module
+- new ECMAScript features
 
 ## Breaking changes
 
-- `#pr`, `<small_break_1>`
-- `#pr`, `<small_break_2>`
+- [#3913](https://github.com/grafana/k6/pull/3913) changes mapping of the Golang's `math/big.Int` type to `bigint` type in k6.
+- [#3922](https://github.com/grafana/k6/pull/3922) removes `lib.Min` and `lib.Max` from k6's Go API, which could affect custom extensions that rely on these functions.
 
 ### (_optional h3_) `<big_breaking_change>` `#pr`
 
@@ -114,24 +113,38 @@ Although we continue to refine and improve the cloud service to handle better th
 as well as the overall user experience, we've added a new `k6 cloud upload` command that replaces the
 `k6 cloud --upload-only` flag used so far, which is now considered deprecated.
 
-### `<big_feature_n>` `#pr`
+### Sobek updates brings support of new ECMAScript features into k6 [`#3925`](https://github.com/grafana/k6/pull/3925), [`#3913`](https://github.com/grafana/k6/pull/3913)
+
+With this release, we've updated [Sobek](https://github.com/grafana/sobek) (the `ECMAScript` implementation in Go) which contains the new ECMAScript features that are now available in k6.
+
+This includes support for numeric literal separators, like:
+
+```javascript
+const billion = 1_000_000_000
+```
+
+And also support for `BigInt`, the values which are too large to be represented by the number primitive.
+
+```javascript
+const huge = BigInt(9007199254740991);
+```
 
-_what, why, and what this means for the user_
+Note: that prior k6 version v0.54, Golang's type `math/big.Int` mapped to another type, so it might be a breaking change for some extensions or users.
 
 ## UX improvements and enhancements
 
 - [#3877](https://github.com/grafana/k6/pull/3877), [#3820](https://github.com/grafana/k6/pull/3820) add `discardResponseMessage` option for gRPC module. Thank you, @lzakharov!
 - [#3898](https://github.com/grafana/k6/pull/3898) adds `SetupTimeout` option validation. Thank you, @tsukasaI!
 - [#3930](https://github.com/grafana/k6/pull/3930) adds token validation for `k6 cloud login`, so now you get immediate feedback right after logging in.
-- [#3925](https://github.com/grafana/k6/pull/3925) updates Sobek to have support for numeric literal separators (e.g. `1_000_000`).
 - [#3876](https://github.com/grafana/k6/pull/3876), [#3923](https://github.com/grafana/k6/pull/3923) adjusts the process' exit code for cloud test runs where thresholds have failed.
 - [#3765](https://github.com/grafana/k6/pull/3765) stops using the confusing `✓` and `✗` for `Rate` metrics, and instead uses the form: `{x} out of {y}`.
+- [#3801](https://github.com/grafana/k6/pull/3801) adds a new argument `meta` to gRPC's stream callback, which handles the timestamp of the original event (e.g. when message has been received). Thank you, @cchamplin!
 
 ## Bug fixes
 
 - [#3947](https://github.com/grafana/k6/pull/3947) fixes panic when `options` is `nil` (e.g. exported from a module where it isn't really exported).
 - [browser#1406](https://github.com/grafana/xk6-browser/pull/1406) fixes panic on iframe attach when iframe didn't contain any UI elements.
-- [browser#1420](https://github.com/grafana/xk6-browser/pull/1420) uses the vu context to control the iterations lifecycle which helps k6 shutdown in a timely manner when a test is aborted.
+- [browser#1420](https://github.com/grafana/xk6-browser/pull/1420) uses the VU context to control the iterations lifecycle which helps k6 shutdown in a timely manner when a test is aborted.
 - [browser#1421](https://github.com/grafana/xk6-browser/pull/1421) fixes the navigation span by starting when the page starts to load so that it's a better representation of how long the test was on a page.
 
 ## Maintenance and internal improvements
@@ -143,9 +156,8 @@ _what, why, and what this means for the user_
 - [#3909](https://github.com/grafana/k6/pull/3909) fixes `ExitCode` description typo. Thank you, @eltociear!
 - [#3926](https://github.com/grafana/k6/pull/3926) documents maintenance of tc39 tests.
 - [#3881](https://github.com/grafana/k6/pull/3881) adds top-level roadmap link.
-- [#3903](https://github.com/grafana/k6/pull/3903), [#3912](https://github.com/grafana/k6/pull/3912), [#3913](https://github.com/grafana/k6/pull/3913), [#3928](https://github.com/grafana/k6/pull/3928) update dependencies.
 - [#3945](https://github.com/grafana/k6/pull/3945) updates the endpoint where [usage reports](https://grafana.com/docs/k6/latest/set-up/usage-collection/) are sent to.
-- [#3922](https://github.com/grafana/k6/pull/3922) replaces custom `min`, `max` and similar functions available in stdlib since Go v1.21.
+- [#3903](https://github.com/grafana/k6/pull/3903), [#3912](https://github.com/grafana/k6/pull/3912), [#3928](https://github.com/grafana/k6/pull/3928) update dependencies.
 
 ## _Optional_ Roadmap