fix: Recognize EJS over multiple lines

[poldridge]

The s flag allows . to match newlines so that if the value only contains a multiline EJS expression it will still be rendered by EJS. It allows this to work:

    status: >-
      <%= 
        [ 
          'pending_approval',
          'approved',
          'rejected',
        ][ ~~(Math.random()*3) ]
      %>

[RobinCK]

thanks