Version 1.71.1
--------------

- New JavaScript features! This version of GJS is based on SpiderMonkey 91, an
 upgrade from the previous ESR (Extended Support Release) of SpiderMonkey 78.
 Here are the highlights of the new JavaScript features.
 For more information, look them up on MDN or devdocs.io.

 * New syntax
   + Private class fields and methods are now supported. They start with `#`
     and are not accessible outside the class in which they are defined.
   + The `??=` logical nullish assignment operator, which assigns the
     right-hand side value to the left-hand side variable if the variable is
     null or undefined.
   + The `&&=` logical-and assignment operator, which assigns the right-hand
     side value to the left-hand side variable if the variable is truthy.
   + The `||=` logical-or assignment operator, which assigns the right-hand
     side value to the left-hand side variable if the variable is falsey.
   + `export * as ... from ...` can be used to aggregate modules.
   + Regular expressions add the `d` flag, which if defined causes the
     resulting match object to have an `indices` property giving the positions
     in the string where capturing and named groups matched.
   + `static { ... }` blocks in classes allow initialization of classes at the
     time of creation of the class.

 * New APIs
   + Arrays, strings, and typed arrays have gained the `at()` method, which
     does the same thing as indexing with square brackets but also allows
     negative numbers, which count from the end, as in Python.
   + `Promise.any()`, which is similar to `Promise.race()` but resolves on the
     first successful sub-promise, instead of the first to resolve.
   + `Error()` now takes an options object as its second parameter, which may
     contain a `cause` property. This option is used to indicate when an error
     is caused by another error, but the first error is caught during error
     handling.
   + `WeakRef`, which allows you to hold a reference to an object while still
     allowing it to be garbage collected.
   + `dateStyle`, `timeStyle`, `fractionalSecondDigits`, and `dayPeriod` are
     now accepted as options in `Intl.DateTimeFormat()` and
     `Date.prototype.toLocaleString()`.
   + `collation` is now accepted as an option in `Intl.Collator()`.
   + `Intl.DisplayNames` has been added, which allows you to get translations
     of language, region, currency, and script names.
   + `Intl.DateTimeFormat` has gained the `formatRange()` and
     `formatRangeToParts()` methods.

 * New behaviour
   + More numbering systems are supported in `Intl.NumberFormat`.
   + Top-level await (https://v8.dev/features/top-level-await) allows you to
     use `await` statements outside of an `async` function in an ES module.
   + There are a lot of minor behaviour changes as SpiderMonkey's JS
     implementation conforms ever closer to existing ECMAScript standards and
     adopts new ones. For complete information, read the Firefox developer
     release notes:
     https://developer.mozilla.org/en-US/Firefox/Releases/79#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/80#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/81#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/82#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/83#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/84#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/85#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/86#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/87#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/88#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/89#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/90#JavaScript
     https://developer.mozilla.org/en-US/Firefox/Releases/91#JavaScript

- It's now possible to pass BigInt values to GObject-introspected functions with
 64-bit parameters. This way, you can finally work with large numbers that
 cannot be accurately stored as a JS Number value and pass them correctly into
 C. For example, `GLib.Variant.new_int64(2n ** 62n)`.

- New API: GJS now has a standards-compliant `setTimeout()` and `setInterval()`.
 These can now be used as in web browsers, while still integrating with GLib's
 main loop.

- New API: `Cairo.Context.prototype.textExtents()` which makes the
 `cairo_text_extents()` C function available to JavaScript.

- New overrides: `GLib.MAXINT64_BIGINT`, `GLib.MININT64_BIGINT`, and
 `GLib.MAXUINT64_BIGINT` are BigInt-typed versions of `GLib.MAXINT64` etc.

- It's now possible to use a regular `constructor()` in GObject classes instead
 of an `_init()` method.

- It's now possible to use class fields in GObject classes.

- `Gio._promisify()` now tries to guess the name of the finish function, if it
 is omitted.

- It's now possible to monkeypatch methods on the prototype of a GObject
 interface. The most common use case for this is probably promisifying methods
 on `Gio.File`, so you can now do things like
 `Gio._promisify(Gio.File.prototype, 'read_async')` without resorting to the
 `Gio._LocalFilePrototype` workaround.

- GObject interfaces are now enumerable, so you can now do things like
 `Object.keys(Gio.File.prototype)` and get a list of the methods, like you can
 with other GObject types.

- Improvements to the performance of promises, making them more predictable
 under higher load.

- Several performance and type-safety improvements.

- Closed bugs and merge requests:

 * [Mainloop 1/3] Add custom GSource for promise queueing [#1, !557, Evan
   Welsh, Marco Trevisan]
 * Upgrade to SpiderMonkey 91 [#413, !632, !687, Evan Welsh, Philip Chimento,
   Chun-wei Fan]
 * Promise rejections from signal handlers are silent [#417, !632, Philip
   Chimento]
 * Add a binding for GObject.Object.new [#48, !664, Evan Welsh, Philip
   Chimento]
 * Object resolve should consider prototypes of GObject interfaces [#189, !665,
   Evan Welsh, Philip Chimento]
 * File corruption on file.replace_contents_async [#192, !665, Evan Welsh]
 * Overriding inherited interface vfuncs clobbers base class implementation
   [#89, !671, Evan Welsh]
 * Errors in __init__.js are silenced [#343, !672, Evan Welsh]
 * Allocate structs which contain pointers [!674, Evan Welsh]
 * [Mainloop 3/3] WHATWG Timers [!677, Evan Welsh]
 * [Mainloop 2/3] Implement "implicit" mainloop which only blocks on unresolved
   imports [!678, Evan Welsh]
 * Correctly chain constructor prototypes to enable static inheritance [!679,
   Evan Welsh]
 * Upgrade CI to Fedora 34 [!683, !684, Philip Chimento]
 * Various maintenance [!685, !691, !709, !719, Philip Chimento]
 * doc: Add Junction to applications written in GJS [!688, Sonny Piers]
 * C++ argument cache [!689, Marco Trevisan, Philip Chimento]
 * Gio: Make _promisify to guess the finish function by default [!692, Marco
   Trevisan]
 * Fails to build with Meson 0.60.2 [#446, !694, !705, Jan Beich, Eli Schwartz]
 * doc: Add Oh My SVG to standalone applications [!695, Sonny Piers]
 * ci: Ensure forever callbacks do not leak [!698, Evan Welsh]
 * gi: Refactor resolving prototypes in GIWrapperInstance constructors [!699,
   Evan Welsh]
 * Class fields don't work with GObject classes [#331, !700, Evan Welsh]
 * gi: Add enumeration hook for Interface prototypes [!701, Evan Welsh]
 * Fix Visual Studio builds on master [!706, Chun-wei Fan]
 * tools: Add iwyu-tool as a binary name for iwyu [!707, Evan Welsh]
 * gi: Allow GObject.Value boxed type in nested contexts [!708, Evan Welsh,
   Philip Chimento]
 * Implemented check for null out-params in some functions in context.cpp
   [!710, Nasah Kuma]
 * Broken links on the doc/Home.md file [#458, !711, Andy Holmes]
 * Accept BigInt values as input for 64-bit parameters to introspected
   functions [!712, Marco Trevisan, Philip Chimento]
 * Enable top-level await [!713, Evan Welsh]
 * modules: Remove double '//' from internal module URIs [!714, Evan Welsh]
 * modules: Ensure ImportError is an instance of globalThis.Error [!715, Evan
   Welsh]
 * global: Enable WeakRefs [!716, Evan Welsh]
 * global: Enable static class blocks [!717, Evan Welsh]
 * overrides: Allow users to implement construct-only props with getters [!718,
   Evan Welsh]
 * cairo: Add binding for cairo_text_extents() [!720, Philip Chimento]
 * Non-integer numbers can not be converted to (u)int64 [#459, !721, Philip
   Chimento]
 * Print error cause when logging an error [#454, !722, Philip Chimento]
 * GtkCustomSorter callbacks receives undefined params [#460, !723, Philip
   Chimento]

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