Update theme.json classes for WordPress 5.9.

This commit ports to core the changes to the classes that deal with theme.json code.

See #54336.
Props oandregal, spacedmonkey, noisysocks, hellofromtonya, youknowriad.

git-svn-id: https://develop.svn.wordpress.org/trunk@52049 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/theme.json

@@ -1,14 +1,19 @@
 {
-	"version": 1,
+	"version": 2,
 	"settings": {
 		"border": {
-			"customRadius": false
+			"color": false,
+			"radius": false,
+			"style": false,
+			"width": false
 		},
 		"color": {
 			"custom": true,
 			"customDuotone": true,
  			"customGradient": true,
  			"link": false,
+			"background": true,
+			"text": true,
 			"duotone": [
 				{
 					"name":  "Dark grayscale" ,
@@ -177,14 +182,20 @@
 			]
 		},
 		"spacing": {
-			"customMargin": false,
-			"customPadding": false,
+			"blockGap": null,
+			"margin": false,
+			"padding": false,
 			"units": [ "px", "em", "rem", "vh", "vw", "%" ]
 		},
 		"typography": {
 			"customFontSize": true,
-			"customLineHeight": false,
 			"dropCap": true,
+			"fontStyle": true,
+			"fontWeight": true,
+			"letterSpacing": true,
+			"lineHeight": false,
+			"textDecoration": true,
+			"textTransform": true,
 			"fontSizes": [
 				{
 					"name": "Small",
@@ -216,9 +227,20 @@
 		"blocks": {
 			"core/button": {
 				"border": {
-					"customRadius": true
+					"radius": true
+				}
+			},
+			"core/pullquote": {
+				"border": {
+					"color": true,
+					"radius": true,
+					"style": true,
+					"width": true
 				}
 			}
 		}
+	},
+	"styles": {
+		"spacing": { "blockGap": "24px" }
 	}
 }