Fixes setting API url

What's Changed

• Fixes setting API url by @vityachis in #7

New Contributors

• @vityachis made their first contribution in #7

Full Changelog: 1.0.7...1.0.7.1

1.0.7: Added: ZipcodeAddOn

Updated:
 - Address & AddressInterface
 - Envelope & EnvelopeInterface

Add getEnvelope() method

Add getEnvelope() method (#3)

- Add getEnvelope() method
- Minor fixes

Add getBalance() method

Add getBalance() method (#2)

* Add getBalance method
Minor fixes

Adjust Envelope Interface

1.0.4

Update EnvelopeInterface.php

1.0.3

Update Envelope.php

1.0.2

Minor fixes

1.0.1

WIP

1.0.0

Initial commit