✨ Add changelog for 0.91.0 (#251)

docs/reference/changelog.md

@@ -1,5 +1,36 @@
 # Changelog
 
+## n8n@0.91.0 
+For a comprehensive list of changes, check out the [commits](https://github.com/n8n-io/n8n/compare/n8n@0.90.0...n8n@0.91.0) for this version.<br />
+**Release date:** 2020-10-23
+
+- New nodes
+    - Kafka
+    - MailerLite
+    - MailerLite Trigger
+    - Pushbullet
+- Enhanced nodes
+    - Airtable: Added Ignore Fields option for the Update operation
+    - AMQP Sender: Added Azure Service Bus support
+    - Google Calendar: Added Calendar resource and added an option to add a conference link
+    - G Suite Admin: Added Group resource
+    - HTTP Request: Added Batch Size and Batch Interval option
+    - Mautic: Added Company resource
+    - Salesforce: Added OAuth 2.0 JWT authentication method
+- Bug Fixes
+    - IF: Fixed an issue with undefined expression
+    - Paddle: Fixed an issue with the Return All parameter
+    - Switch: Fixed an issue with undefined expression
+- Added CLI commands to deactivate the workflow
+- Added an option to get the full execution data from the server
+- The Editor UI gives an alert if you redirect without saving a workflow
+- The Editor UI now indicates if a workflow is saved or not
+- Added a check for the Node.js version on startup
+- Improved support for touch devices
+- Node properties now load on demand
+- Updated the Node.js version for the Docker images
+
+
 ## n8n@0.90.0 
 For a comprehensive list of changes, check out the [commits](https://github.com/n8n-io/n8n/compare/n8n@0.89.2...n8n@0.90.0) for this version.<br />
 **Release date:** 2020-10-23