Count Element Number To Object 
by 凤之兮原 @kongmingLatern
With type ``CountElementNumberToObject``, get the number of occurrences of every item from an array and return them in an object. For example:
~~~ts
type Simple1 = CountElementNumberToObject<[]> // return {}
type Simple2 = CountElementNumberToObject<[1,2,3,4,5]>
// return {
// 1: 1,
// 2: 1,
// 3: 1,
// 4: 1,
// 5: 1
// }
type Simple3 = CountElementNumberToObject<[1,2,3,4,5,[1,2,3]]>
// return {
// 1: 2,
// 2: 2,
// 3: 2,
// 4: 1,
// 5: 1
// }
~~~
