Release v0.19.0

Encompass multiple upstream fixes and changes to int/float bit width

All changes are listed below:

• Schema: (BREAKING): Rename load_balancer_service_update
• Schema: (BREAKING): Make listen_port int32 again (was int64)
• Doc: Fix descriptions for resource IDs
• Schema: (BREAKING): Add default values for pagination params
• Schema: (BREAKING): Use name APIToken for bearerAuth from upstream
• Schema: (BREAKING): Remove required fields from load balancer update
• Doc: Fix example for cert issuance enum
• Doc: Fix missing descriptions in meta object
• Schema: (BREAKING): Apply new integer formats from upstream
• Schema: (BREAKING): Apply decimal price format from upstream
• Doc: Update descriptions from upstream
• Schema: (BREAKING): Add maximum to action IDs and improve doc
• Doc: Remove some unnecessary spaces