Right now query in the nodejs api is just a string. we should support gql-parsed strings too, so that if they are exported elsewhere, it can be used directly.

import gql from 'graphql-tag';

export const GRAPHQL_QUERY=gql`
  query {
    something {
      anotherthing
    }
  }
`;

I'm not sure how feasible this may be, but the old logparser program from Microsoft supported queries like

Select * from test.csv

And it would read from test.csv, without needing any config files.

Is your feature request related to a problem? Please describe.
Sometimes people need to run the same operation on multiple files.
For example: #23

Describe the solution you'd like
Allow -f, --file and -o, --out to be passed multiple times.

Dasel should then perform the operation (put or select) on all of the given files.

Describe alternatives you've considered