update TODO

Author: ylebre

TODO

@@ -59,7 +59,7 @@
 - [v] solid-crud
 - [v] CI integration
 
------- Unit tests -----
+------ Unit/Integration tests -----
 - [v] ClientRegistration
 - [v] JtiStore
 - [v] IpAttempts
@@ -69,9 +69,9 @@
 - [v] Middleware
 - [v] Session
 - [v] Db
-- [ ] Mailer
-- [ ] MailTemplateGenerator
-- [ ] MailTemplates
+- [v] Mailer
+- [v] MailTemplateGenerator
+- [v] MailTemplates
 - [ ] Server
 - [ ] StorageServer
 - [-] SolidNotifications