Update 4 files

Daniel Cothranrequested to merge
issue/charts-3532462:3532462-newfix into 5.2.x
  • /src/Element/BaseSettings.php
  • /src/Form/ChartsConfigForm.php
  • /config/schema/charts.data_types.schema.yml
  • /charts.post_update.php

Closes #3532462

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