PayButton v2.1.2

Fixed issues when generating widgets more than once.

What's Changed

• fix: amount rerendering by @chedieck in #314
• Fix: Update amount in widget React by @johnkuney in #315
• feat: thisCurrencyObject logic refactor by @chedieck in #316
• [#317] fix: address change subscription by @chedieck in #319
• [#320] fix: initial addressType by @chedieck in #324

Full Changelog: 2.1.1...2.1.2