duckling is too aggressive in parsing numbers to years

[savv]

=> (p/parse :en$core "530" [:time])
({:dim :time, :body "530", :value {:type "value", :value "0530-01-01T00:00:00.000-00:01:15", :grain :year, :values ()}, :start 0, :end 3, :latent true})

[savv]

A number of examples:

{ dim: 'time',
  value:
   { type: 'value',
     values: [],
     grain: 'year',
     value: '0645-01-01T00:00:00.000-00:01:15' },
  end: 25,
  start: 22,
  latent: true,
  body: '645' }


{ dim: 'time',
  value:
   { type: 'value',
     values: [],
     grain: 'year',
     value: '0130-01-01T00:00:00.000-00:01:15' },
  end: 3,
  start: 0,
  latent: true,
  body: '130' }
{ dim: 'time',
  value:
   { type: 'value',
     values: [ [Object] ],
     grain: 'year',
     value: '2030-01-01T00:00:00.000Z' },
  end: 8,
  start: 6,
  latent: true,
  body: '30' }


{ dim: 'time',
  value:
   { type: 'value',
     values: [],
     grain: 'year',
     value: '1230-01-01T00:00:00.000-00:01:15' },
  end: 4,
  start: 0,
  body: '1230' }



{ dim: 'time',
  value:
   { type: 'value',
     values: [],
     grain: 'year',
     value: '0530-01-01T00:00:00.000-00:01:15' },
  end: 12,
  start: 9,
  latent: true,
  body: '530' }

And my personal favorite :)

{ dim: 'time',
  value:
   { type: 'value',
     values: [],
     grain: 'year',
     value: '1993-01-01T00:00:00.000Z' },
  end: 15,
  start: 13,
  latent: true,
  body: '-7' }