Updated Release notes (markdown)

Release-notes.md

@@ -1,3 +1,28 @@
+# v5.5.18
+
+Minor fixes for invitation in view portal
+Fixes for showing invoice
+Allow client variables in purchase orders
+Refactor trial confirmed page
+Fixes for applying payment number
+Clean up login controller
+Catch and remove updates for oauth_provider_id
+Add checks for oauth provider id
+Fixes for github actions
+Use transaction when marking an invoice as paid
+Adjust spam filtering
+Minor fixes for templates
+Formatting for client emails
+Check for exec function prior to attemping to use it
+Minor fixes for client filter sorted by display name
+Support for vendor and vendor contact imports
+update vendor csv for tests
+Refactor recurring invoice query
+Improve query efficiency
+Fixes for transforming vendor contacts
+Add indexes to DB
+
+
 # v5.5.17
 
 Add vendor & expense includes for purchase orders