Update CHANGELOG

Author: mbostock

CHANGELOG.md

@@ -8,9 +8,9 @@ Plot can now produce [legends for *color* and *opacity* scales](https://observab
 
 The new [Plot.image(*data*[, *options*])](https://github.com/observablehq/plot/blob/main/README.md#plotimage) mark centers an image on the given *xy* position.
 
-The scale definition returned by *plot*.**scale**(*name*) now includes a *scale*.apply function, allowing you to apply the scale’s encoding directly on the given data value. When applicable, a *scale*.invert function is also returned, which can be useful for interaction.
+All marks now support a new *opacity* option, either as a constant or a channel bound to the *opacity* scale, which sets the mark’s object opacity. The *strokeOpacity* or *fillOpacity* options should be preferred for performance, but the *opacity* option is needed for some cases (such as images).
 
-All quantitative scales now have a default domain.
+All quantitative scales now have a default domain (typically [0, 1]). Ordinal scales now allow a *range* option to be specified in conjunction with a continuous *scheme*; in this case, the *range* should be a subset of the unit interval [0, 1], and the scheme’s interpolator will be truncated accordingly. The *plot*.**scale** method now correctly represents the symmetric transform for diverging scales. The scale definition returned by *plot*.**scale**(*name*) now includes a *scale*.apply function, allowing you to apply the scale’s encoding directly on the given data value. When applicable, a *scale*.invert function is also returned, which can be useful for interaction.
 
 Plot’s stylesheet is now inlined in the generated SVG element rather than injected into the document head. To avoid namespace collisions, we use a randomly-generated class name; use the top-level **className** option to specify a custom class name. The default style now uses font-variant: tabular-nums for a better alignment of numbers.