not boolean expression

[liquid36]

is it posible to implement a not boolean expression? Example:

conditions: {
    not: {
      all: [{
        fact: 'gameDuration',
        operator: 'equal',
        value: 40
      }, {
        fact: 'personalFoulCount',
        operator: 'greaterThanInclusive',
        value: 5
      }]   
    }
},

[andycoopcode]

@liquid36 I've put up a PR addressing this issue if you wanted to take a look: https://github.com/CacheControl/json-rules-engine/pull/275