Unset $offset variable

[antonkomarev]

laravel-mysql-spatial/src/Types/PointCollection.php

Lines 64 to 71 in e17f491

	public function insertPoint($index, Point $point)
	{
	if (count($this->points) - 1 < $index) {
	throw new InvalidArgumentException('$index is greater than the size of the array');
	}
	array_splice($this->points, $offset, 0, [$point]);
	}

[grimzy]

That's code that I mistakenly moved from https://github.com/njbarrett/laravel-postgis and it should definitely be dealt with.

I was thinking about replacing it (#10) and possibly extending the features from Laravel Collection.

What do you think?