Commits on Jun 1, 2021

1. Ecto.Type: Switch embed_as to :dump …

   When using the Ecto typ inside of an embedded schema, we get the following error:
   
   ```
   protocol Jason.Encoder not implemented for ~e[0 12 * * 1 *] of type Crontab.CronExpression (a struct), Jason.Encoder protocol must always be explicitly implemented.
   ```
   
   This is because by default the type will be embedded as a JSON dump of it's struct (see https://hexdocs.pm/ecto/Ecto.Type.html#c:embed_as/1)
   
   Switching to `:dump` means that when embedding this type in a embedded schema we still call the `dump` callback, and the error goes away.

   

   mveytsman authored Jun 1, 2021
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