ec.Signature is not fully available in Typescript

[JessicaMulein]

I think there may be a conflict between the ec class and namespace, but ec.Signature is not available to me and I need to reconstitute a toDer('hex') to an ec.Signature..
Also, other typescript issues- had to make/do this

  /**
   * Generate an options object for the ECDSA signing key.
   */
  public static get DataKeyPairOptions(): RSAKeyPairOptions<'pem', 'pem'> {
    const args = {
      modulusLength: StaticHelpers.AsymmetricKeyBits,
      publicKeyEncoding: {
        type: 'pkcs1',
        format: 'pem',
      },
      privateKeyEncoding: {
        type: 'pkcs1',
        format: 'pem',
      },
    };

    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
    // @ts-ignore
    return args;
  }