v4 API: Sequences

[n7studios]

Summary

Adds support for endpoints in the sequences section of the v4 API.

Testing

• testGetSequencesPagination: Test that get_sequences() returns the expected data when pagination parameters and per_page limits are specified.
• testGetSequenceSubscriptionsWithBouncedSubscriberState: Test that get_sequence_subscriptions() returns the expected data when a valid Sequence ID is specified and the subscription status is cancelled.
• testGetSequenceSubscriptionsWithAddedAfterParam: Test that get_sequence_subscriptions() returns the expected data when a valid Sequence ID is specified and the added_after parameter is used.
• testGetSequenceSubscriptionsWithAddedBeforeParam: Test that get_sequence_subscriptions() returns the expected data when a valid Sequence ID is specified and the added_before parameter is used.
• testGetSequenceSubscriptionsWithCreatedAfterParam: Test that get_sequence_subscriptions() returns the expected data when a valid Sequence ID is specified and the created_after parameter is used.
• testGetSequenceSubscriptionsWithCreatedBeforeParam: Test that get_sequence_subscriptions() returns the expected data when a valid Sequence ID is specified and the created_before parameter is used.
• testGetSequenceSubscriptionsPagination: Test that get_sequence_subscriptions() returns the expected data when a valid Sequence ID is specified and pagination parameters and per_page limits are specified.
• testGetSequenceSubscriptionsWithInvalidSequenceID: Test that get_sequence_subscriptions() throws a ClientException when an invalid Sequence ID is specified.
• testGetSequenceSubscriptionsWithInvalidSubscriberState: Test that get_sequence_subscriptions() throws a ClientException when an invalid subscriber state is specified.
• testGetSequenceSubscriptionsWithInvalidPagination: Test that get_sequence_subscriptions() throws a ClientException when invalid pagination parameters are specified.
• testAddSubscriberToSequenceByID: Test that add_subscriber_to_sequence_by_subscriber_id() returns the expected data.
• testAddSubscriberToSequenceByIDWithInvalidSequenceID: Test that add_subscriber_to_sequence_by_subscriber_id() throws a ClientException when an invalid Sequence ID is specified.
• testAddSubscriberToSequenceByIDWithInvalidSubscriberID: Test that add_subscriber_to_sequence_by_subscriber_id() throws a ClientException when an invalid email address is specified.

Removed Tests:

• testAddSubscriberToSequenceWithFirstName
• testAddSubscriberToSequenceWithCustomFields
• testAddSubscriberToSequenceWithTagID

v4 API has no concept of adding a new subscriber to a sequence with data; a separate PR will be added to add support for the new Create a subscriber endpoint (https://developers.convertkit.com/v4.html#create-a-subscriber), which supports this.

Checklist

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• The code passes when running PHPStan
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

[noelherrick]

Looks good, same comment around existing vs. new subscriber applies here.

[n7studios]

Looks good, same comment around existing vs. new subscriber applies here.

This PR exposes the response object, allowing the consumer to inspect the HTTP status code.