storage: add method for pinning multiple cids

[shomix]

This PR will:

• Add a new method called pinCIDs. This method can be used to send multiple CID to the pinning queue, and the return value of it will contain an array of upload id's that can be used later to check that status of the pin.

async pinCIDs(configuration: { name: string; cids: string[] }): Promise<
    {
      uploadId: string;
      cid: string;
    }[]
  >

• increase the version of the @spheron/core package to 2.0.5
• increase the version of the @spheron/storage package to 2.0.4

[aayushmahapatra]

Lgtm