6.6.0

What's Changed

• Fix broadcast "list all channels" to use /all-channels endpoint by @kylebrowning in #240
• Make URLSession client honor the HTTP status code by @kylebrowning in #241
• Add NIO APNSClient send coverage against APNSTestServer by @kylebrowning in #242
• Use expirationDurationInSeconds for token refresh window by @kylebrowning in #243
• Tidy broadcast channel model and harden broadcast/error handling by @kylebrowning in #244

Full Changelog: 6.5.0...6.6.0