Add settigns for typography

Found them in the settings that WordPress passes to Gutenberg when
editing a page.

editor/Editor.jsx

@@ -26,6 +26,45 @@ export default function Editor() {
 											 { css: blockLibraryEditor },
 											 { css: formatLibraryStyle },
 									 ],
+									 __experimentalFeatures: {
+											 typography: {
+													 defaultFontSizes: true,
+													 dropCap: true,
+													 fontSizes: {
+															 default: [
+																	 {
+																			 name: "Small",
+																			 slug: "small",
+																			 size: "13px",
+																	 },
+																	 {
+																			 name: "Medium",
+																			 slug: "medium",
+																			 size: "20px",
+																	 },
+																	 {
+																			 name: "Large",
+																			 slug: "large",
+																			 size: "36px",
+																	 },
+																	 {
+																			 name: "Extra Large",
+																			 slug: "x-large",
+																			 size: "42px",
+																	 },
+															 ],
+													 },
+													 customFontSize: true,
+													 fontStyle: true,
+													 fontWeight: true,
+													 letterSpacing: true,
+													 textAlign: true,
+													 textColumns: false,
+													 textDecoration: true,
+													 textTransform: true,
+													 writingMode: false,
+											 },
+									 },
 							 } }
 					 >
 							 <BlockEditor/>