First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/vscode-jsonrpc/lib/common/semaphore.d.ts

@@ -0,0 +1,10 @@
+export declare class Semaphore<T = void> {
+    private _capacity;
+    private _active;
+    private _waiting;
+    constructor(capacity?: number);
+    lock(thunk: () => T | PromiseLike<T>): Promise<T>;
+    get active(): number;
+    private runNext;
+    private doRunNext;
+}