Fix tsconfigs, IDisposable, and add comments

addons/xterm-addon-clipboard/package.json

@@ -7,7 +7,7 @@
   },
   "main": "lib/xterm-addon-clipboard.js",
   "types": "typings/xterm-addon-clipboard.d.ts",
-  "repository": "https://github.com/xtermjs/xterm.js",
+  "repository": "https://github.com/xtermjs/xterm.js/tree/master/addons/xterm-addon-clipboard",
   "license": "MIT",
   "keywords": [
     "terminal",

addons/xterm-addon-clipboard/src/ClipboardAddon.ts

@@ -4,18 +4,17 @@
  */
 
 import { ClipboardProvider } from './ClipboardProvider';
-import { IClipboardProvider, ITerminalAddon, Terminal } from 'xterm';
+import { IClipboardProvider, IDisposable, ITerminalAddon, Terminal } from 'xterm';
 
 export class ClipboardAddon implements ITerminalAddon {
-  private _terminal: Terminal | undefined;
+  private _disposable: IDisposable | undefined;
   constructor(private _provider: IClipboardProvider = new ClipboardProvider()) {}
 
   public activate(terminal: Terminal): void {
-    this._terminal = terminal;
-    terminal.registerClipboardProvider(this._provider);
+    this._disposable = terminal.registerClipboardProvider(this._provider);
   }
 
   public dispose(): void {
-    this._terminal?.deregisterClipboardProvider();
+    return this._disposable?.dispose();
   }
 }

addons/xterm-addon-clipboard/src/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "module": "commonjs",
-    "target": "es2017",
+    "target": "es2021",
     "sourceMap": true,
     "outDir": "../out",
     "rootDir": ".",

addons/xterm-addon-clipboard/test/tsconfig.json

@@ -1,9 +1,9 @@
 {
   "compilerOptions": {
     "module": "commonjs",
-    "target": "es2015",
+    "target": "es2021",
     "lib": [
-      "es2015"
+      "es2021"
     ],
     "rootDir": ".",
     "outDir": "../out-test",
@@ -19,4 +19,4 @@
     "./**/*",
     "../../../typings/xterm.d.ts"
   ]
-}
+}