Add CompletionItem.deprecated property from LSP

src/vs/editor/common/modes.ts

@@ -396,6 +396,10 @@ export interface CompletionItem {
 	 * an icon is chosen by the editor.
 	 */
 	kind: CompletionItemKind;
+	/**
+	 * Indicates if this item is deprecated.
+	 */
+	deprecated?: boolean;
 	/**
 	 * A human-readable string with additional information
 	 * about this item, like type or symbol information.

src/vs/monaco.d.ts

@@ -4790,6 +4790,10 @@ declare namespace monaco.languages {
 		 * an icon is chosen by the editor.
 		 */
 		kind: CompletionItemKind;
+		/**
+		 * Indicates if this item is deprecated.
+		 */
+		deprecated?: boolean;
 		/**
 		 * A human-readable string with additional information
 		 * about this item, like type or symbol information.