Method checks if the thing is a Vector.
Vector definition:
Vector {
x: number,
y: number,
}
Usage
-----
```js
const result = MathUtils.check.isVector(p);
p
:any
- the thing to check
boolean
- true if the thing is vector
// Is a vector:
MathUtils.check.isVector({ x: 1, y: 2 }) === true;
// Is not a vector:
MathUtils.check.isVector({ x: 1, y: 'nope' }) === false;
MathUtils.check.isVector(9) === false;