Add version numbers to all --json output

[dsherret]

We should include a version number (not the deno version) in all --json output.

{
  "version": 1,
  // rest of properties
}

When we do a backwards incompatible change (which is unfortunately inevitable), we should bump this version for the specific output. The output would then be versioned by this number and not by the CLI version.

This will allow tools that use this information to only have to check this number to quickly tell if they have support for certain output and not have to sniff the CLI version and know which CLI version something changed.

Related: denoland/deno_graph#231