getting typescript compilation error about node-ts-cache HOT 8 CLOSED

node_modules/node-ts-cache/src/strategy/caching/abstract.base.strategy.ts:9:12 - error TS1243: 'async' modifier cannot be used with 'abstract' modifier.

9     public async abstract getItem<T>(key: string): Promise<T>;
             ~~~~~

node_modules/node-ts-cache/src/strategy/caching/abstract.base.strategy.ts:11:12 - error TS1243: 'async' modifier cannot be used with 'abstract' modifier.

11     public async abstract setItem(key: string, content: any, options: any): Promise<void>;
              ~~~~~

node_modules/node-ts-cache/src/strategy/caching/abstract.base.strategy.ts:13:12 - error TS1243: 'async' modifier cannot be used with 'abstract' modifier.

13     public async abstract clear(): Promise<void>;

src/app.ts:16:10 - error TS2305: Module '"../node_modules/node-ts-cache/dist"' has no exported member 'ExpirationStrategy'.

16 import { ExpirationStrategy, MemoryStorage } from "node-ts-cache";
            ~~~~~~~~~~~~~~~~~~

src/app.ts:16:30 - error TS2305: Module '"../node_modules/node-ts-cache/dist"' has no exported member 'MemoryStorage'.

16 import { ExpirationStrategy, MemoryStorage } from "node-ts-cache";
                                ~~~~~~~~~~~~~