### Image Flipping
Flips an image horizontally or vertically.
**Example:** Flip a 2x2 image horizontally: [[1,2],[3,4]] becomes [[2,1],[4,3]].
**Constraints:** Image size: 2x2 to 10x10.
Test Cases
Test Case 1
Input:
[[1,2],[3,4]]Expected:
[[2,1],[4,3]]Test Case 2
Input:
[[5,6],[7,8]]Expected:
[[6,5],[8,7]]+ 3 hidden test cases