2.0.0

• Drop support for PHP 7.2 and 7.3
• Require guzzlehttp/guzzle ^8.0, guzzlehttp/promises ^3.0, and guzzlehttp/psr7 ^3.0
• Require guzzlehttp/command ^2.0 and guzzlehttp/uri-template ^2.0
• Remove the legacy baseUrl service description option; use baseUri instead
• Reject non-string and non-stringable baseUri service-description values before URI construction
• Remove the legacy responseClass operation option; use responseModel instead
• Reject native PHP serialization of runtime client pipeline objects
• Redact API-key-bearing command and HTTP arguments from PHP 8.2+ backtraces
• Default operations without an httpMethod to GET, preserve explicit httpMethod casing, and reject invalid httpMethod values
• Require header location values to be strings or non-empty arrays of strings
• Reject non-finite float command values in request locations
• Return body response location values as strings instead of PSR-7 streams
• Return raw PSR-7 responses in the response result key when the process client option is false
• Allow operations to override response processing with the process operation option
• Support JSON response fields with multiple allowed type values
• Reject scalar top-level JSON response bodies
• Let native JsonException report JSON location encoding and decoding failures
• Escape unsafe service metadata and response values in generated exceptions
• Require custom implementations and subclasses of public service APIs to match native method signatures
• Require custom parameter filters and extension points to accept exact value types instead of relying on scalar coercion
• Validate cast integer values against string enum, pattern, and length constraints
• Match string enum values strictly by type and value
• Normalize stringable command values for string parameters during validation
• Treat explicit false values as present in Parameter::has() while omitted required and static flags remain absent
• Limit XML response traversal and additional-property conversion to 512 nested elements by default
• Serialize XML request scalar element text with XMLWriter text escaping instead of CDATA sections
• Honor the documented GuzzleClient response_locations option when building the default deserializer
• Reject invalid GuzzleClient configuration option values
• Reject loose parameter schema values instead of normalizing them
• Require null schema types to match only null values
• Improve PHPDoc for service client transformers, command handler stacks, and service description, operation, and parameter schema arrays
• Mark Operation, ValidatedDescriptionHandler, and Rfc3986Serializer as soft-final with @final annotations
• Trim XML response text nodes with XML whitespace characters only