PHP 8.1 release

See issue #24 for details and commits

Fix some Guzzle deprecated notices

• Move standalone finction to Query class method.
• Added leadign '/' to all paths.

Additional Content-Type rules

Issue #21 apply same Content-Type rule in AbstractCollection

Multiple fixes and additions

• Issue #20 additional webhook property
• Issue #21 cater for suffixes on content-type (cater by stripping off and ignoring)
• Issue #19 class name typo fixed

This supports PHP 7.1 to 7.3, and Starling API 1.0.3

Extend Carbon dependency to 2.x (1.x still supported)

Merge pull request #18 from consilience/issue17

Issue #17 Support Carbon v2.x

Add SCAN properties to payment account notification

Issue #15

OpenAPI v3.0.1 introduces originSortCode and originAccountNumber to the AccountTransactionNotification. This change supports those two new properties.

Note: the origin account name is not supplied.

Fix AccountTransactionNotification returns an empty notificationType()

Issue #14

Support additionalRemittanceInformation

Bizarrely, release 1.1.0 did not contain the latest changes. Creating a new release, against the same code, but with fingers crossed.

Support additionalRemittanceInformation

For issue #11

Stable release numbering

The unstable (< 1.0.0) version was causing version hell in my application, so raising it to a stable version.