Fixes typescript compile error

src/assets.ts

@@ -11,7 +11,7 @@ import * as vscode from 'vscode';
 import * as tasks from 'vscode-tasks';
 import {OmnisharpServer} from './omnisharp/server';
 import * as serverUtils from './omnisharp/utils';
-import * as protocol from './omnisharp/protocol.ts'
+import * as protocol from './omnisharp/protocol'
 
 interface DebugConfiguration {
     name: string,