Mailtrain - Package Updates

[girish]

This topic is to track Mailtrain package updates.

Please open issues in a separate topic instead of replying here.

[girish]

[1.6.4]

• Fix screenshot links
• Add forum url in manifest

[girish]

[1.7.0]

• Use base image v3

[girish]

[1.8.0]

• Use node 8 LTS

[nebulon]

[1.8.1]

• Use node 10 to fix SSL issues

This is now a custom fork of the v1 at https://github.com/cloudron-io/mailtrain using the also custom node module https://github.com/cloudron-io/jquery-file-upload-middleware
Those were required to be compatible with the current nodejs promise and other apis.