Update LKG

lib/lib.es2017.sharedmemory.d.ts

@@ -27,10 +27,6 @@ interface SharedArrayBuffer {
      */
     readonly byteLength: number;
 
-    /*
-     * The SharedArrayBuffer constructor's length property whose value is 1.
-     */
-    length: number;
     /**
      * Returns a section of an SharedArrayBuffer.
      */

lib/lib.es5.d.ts

@@ -1067,7 +1067,7 @@ interface JSON {
     /**
      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
      * @param value A JavaScript value, usually an object or array, to be converted.
-     * @param replacer An array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
+     * @param replacer An array of strings and numbers that acts as an approved list for selecting the object properties that will be stringified.
      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
      */
     stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
@@ -1528,6 +1528,26 @@ type ReturnType<T extends (...args: any) => any> = T extends (...args: any) => i
  */
 type InstanceType<T extends new (...args: any) => any> = T extends new (...args: any) => infer R ? R : any;
 
+/**
+ * Convert string literal type to uppercase
+ */
+type Uppercase<S extends string> = intrinsic;
+
+/**
+ * Convert string literal type to lowercase
+ */
+type Lowercase<S extends string> = intrinsic;
+
+/**
+ * Convert first character of string literal type to uppercase
+ */
+type Capitalize<S extends string> = intrinsic;
+
+/**
+ * Convert first character of string literal type to lowercase
+ */
+type Uncapitalize<S extends string> = intrinsic;
+
 /**
  * Marker for contextual 'this' type
  */
@@ -4284,6 +4304,7 @@ declare namespace Intl {
         style?: string;
         currency?: string;
         currencyDisplay?: string;
+        currencySign?: string;
         useGrouping?: boolean;
         minimumIntegerDigits?: number;
         minimumFractionDigits?: number;

lib/lib.esnext.d.ts

@@ -22,3 +22,4 @@ and limitations under the License.
 /// <reference lib="esnext.intl" />
 /// <reference lib="esnext.string" />
 /// <reference lib="esnext.promise" />
+/// <reference lib="esnext.weakref" />

lib/lib.esnext.weakref.d.ts

@@ -0,0 +1,75 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface WeakRef<T extends object> {
+    readonly [Symbol.toStringTag]: "WeakRef";
+
+    /**
+     * Returns the WeakRef instance's target object, or undefined if the target object has been
+     * reclaimed.
+     */
+    deref(): T | undefined;
+}
+
+interface WeakRefConstructor {
+    readonly prototype: WeakRef<any>;
+
+    /**
+     * Creates a WeakRef instance for the given target object.
+     * @param target The target object for the WeakRef instance.
+     */
+    new<T extends object>(target?: T): WeakRef<T>;
+}
+
+declare var WeakRef: WeakRefConstructor;
+
+interface FinalizationRegistry {
+    readonly [Symbol.toStringTag]: "FinalizationRegistry";
+
+    /**
+     * Registers an object with the registry.
+     * @param target The target object to register.
+     * @param heldValue The value to pass to the finalizer for this object. This cannot be the
+     * target object.
+     * @param unregisterToken The token to pass to the unregister method to unregister the target
+     * object. If provided (and not undefined), this must be an object. If not provided, the target
+     * cannot be unregistered.
+     */
+    register(target: object, heldValue: any, unregisterToken?: object): void;
+
+    /**
+     * Unregisters an object from the registry.
+     * @param unregisterToken The token that was used as the unregisterToken argument when calling
+     * register to register the target object.
+     */
+    unregister(unregisterToken: object): void;
+}
+
+interface FinalizationRegistryConstructor {
+    readonly prototype: FinalizationRegistry;
+
+    /**
+     * Creates a finalization registry with an associated cleanup callback
+     * @param cleanupCallback The callback to call after an object in the registry has been reclaimed.
+     */
+    new(cleanupCallback: (heldValue: any) => void): FinalizationRegistry;
+}
+
+declare var FinalizationRegistry: FinalizationRegistryConstructor;