update CHANGELOG

Author: mbostock

CHANGELOG.md

@@ -23,7 +23,7 @@ Plot.marks(
 
 The [Plot.marks(...*marks*)](https://github.com/observablehq/plot/blob/main/README.md#plotmarksmarks) function provides [*mark*.plot](https://github.com/observablehq/plot/blob/main/README.md#plotplotoptions) shorthand for array marks. This is useful for composite marks, such as [boxes](https://github.com/observablehq/plot/blob/8fef4fa52a4cca4135f5f964e3c328ef8f18f672/test/plots/morley-boxplot.js#L18-L23).
 
-All marks now support the [shapeRendering option](https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/shape-rendering). (This is a constant; it may not vary across marks.) All marks now allow strokeWidth to be specified as a channel. (The strokeWidth channel is unscaled; values are specified in literal pixels.) Text marks now also allow stroke and strokeOpacity to be specified as channels. If its fill is not *none*, a line’s default stroke is now *none* rather than *currentColor*, making it consistent with dot and other marks. When a fill or fillOpacity channel is used with a link, or when a stroke or strokeOpacity channel is used with a rule, undefined values will now be filtered. The text mark now uses attributes instead of styles for font rendering properties, improving compatibility with Firefox.
+All marks now support the [shapeRendering](https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/shape-rendering)  option. (This is a constant; it may not vary across marks.) All marks now allow strokeWidth to be specified as a channel. (The strokeWidth channel is unscaled; values are specified in literal pixels.) Text marks now also allow stroke and strokeOpacity to be specified as channels. If its fill is not *none*, a line’s default stroke is now *none* rather than *currentColor*, making it consistent with dot and other marks. When a fill or fillOpacity channel is used with a link, or when a stroke or strokeOpacity channel is used with a rule, undefined values will now be filtered. The text mark now uses attributes instead of styles for font rendering properties, improving compatibility with Firefox.
 
 <img width="640" alt="a series of dots with an increasing stroke width" src="https://user-images.githubusercontent.com/7001/130228992-eb2452f1-8822-4239-87b7-07f79e5a2ccb.png">
 
@@ -95,6 +95,8 @@ Plot.plot({
 })
 ```
 
+The *axis*, *label*, and *line* options (along with *grid*) can now be set as a top-level option, or a facet-level option, and inherited by *x* and *y* or *fx* and *fy*. This is most often useful for turning off all default axes or labels by setting the respective option to null.
+
 ### Facets
 
 The mark *facet* option can be used to control whether or not a mark is faceted. The supported values are *auto*, *include*, *exclude*, and null. True is an alias for *include* and false is an alias for null. The default is *auto*, which facets a mark if and only if its data is strictly equal to the facet data. The *include* facet mode allows a mark with different data to be faceted; however, it requires that the mark’s data be parallel with the facet data (*i.e.*, have the same length and order). The *exclude* facet mode shows all data that are not present in the current facet; this can provide shared context across facets without overdrawing. The null mode disables faceting, replicating the mark across all facets.