update for version to BETA

added updates for README

updates for readme

added update for method getcurrentfee

added update for escrows

Merge pull request #154 from LinkdropHQ/3.13.1-beta_branch

3.13.1 beta branch

Merge pull request #154 from LinkdropHQ/3.13.1-beta_branch

3.13.1 beta branch

added cbBTC token for deposit with auth

added cbBTC token for deposit with auth

added cbBTC token for deposit with auth