merge 2 dictionaries in 1 with the operator += changes will keep in the left one

updateDictionaty

/**
add the content of a dictionary into another dictionary
swift 3
*/
func += <K>( dict1:inout [K:Any], dict2:[K:Any]){
    dict2.forEach { (key: K, value: Any) in
        dict1[key] = value
    }
}