You are given a large integer represented as an integer array `digits`, where each `digits[i]` is the `ith` digit of the integer. The digits are ordered from most significant to least significant in left-to-right order. The large integer does not contain any leading `0`'s.

Increment the large integer by one and return the resulting array of digits.

Example 1:

    Input: digits = [1,2,3]
    Output: [1,2,4]
    Explanation: The array represents the integer 123.
    Incrementing by one gives 123 + 1 = 124.
    Thus, the result should be [1,2,4].

Example 2:

    Input: digits = [4,3,2,1]
    Output: [4,3,2,2]
    Explanation: The array represents the integer 4321.
    Incrementing by one gives 4321 + 1 = 4322.
    Thus, the result should be [4,3,2,2].

Example 3:

    Input: digits = [9]
    Output: [1,0]
    Explanation: The array represents the integer 9.
    Incrementing by one gives 9 + 1 = 10.
    Thus, the result should be [1,0].

Constraints:

- `1 <= digits.length <= 100`
- `0 <= digits[i] <= 9`
- `digits` does not contain any leading `0`'s.