Support for Terminal Endpoint

The Paystack-rs crate now has full support for the Paystack Terminal endpoint.

What's Changed

• Restructure functions by @morukele in #16
• Terminal by @morukele in #28
• updated CI/CD to allow PR to have access to test secrets by @morukele in #30
• added env variables to test run by @morukele in #31
• cleanup by @morukele in #32
• changed all &str to String by @morukele in #33
• Transaction Split Tests by @Lilit0x in #29

New Contributors

• @Lilit0x made their first contribution at #29

Full Changelog: v0.2.0...v0.2.1