chore(deps): update dependency odoo12-addon-mass-mailing-list-dynamic to v12.0.1.0.4.99.dev4

This MR contains the following updates:

Package	Update	Change
odoo12-addon-mass-mailing-list-dynamic	patch	==12.0.1.0.4.99.dev1 -> ==12.0.1.0.4.99.dev4

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