v2.0.0

Changes:

• Removed JSONRPC2Notification
• Updated JSONRPC2Batch(items:) to JSONRPC2Batch(requests:)
• Added JSONRPC2Request(method:params:) initializer, JSONRPC2ServerNotification and JSONRPC2ServerNotificationWithParams

Full Changelog: v1.0.0...v2.0.0

v1.0.0

Initial release of JSONRPC2.