• with this change structure similarity is 60% of the result and value similarity is 40% of the result
• the value similarity is now number of value match / number of expected property instead of number of value match / number of matched keys. This avoids to have a high ratio if only one key match the expected object.

before:

• { "a": 1, "d": 5 } and { "a": 1, "d": 2 }: have a value similarity equals to 0.5
• { "a": 1, "d": 5 } and { "a": 1 }: have a value similarity equals to 1

now:

• { "a": 1, "d": 5 } and { "a": 1, "d": 2 }: have a value similarity equals to 0.5
• { "a": 1, "d": 5 } and { "a": 1 }: have a value similarity equals to 0.5

close #8