Zip fail to unzip when there's file with same name but with different capatilization

[vincent-paing]

Steps to reproduce

• Create a file named "test.txt"
• Zip the file and name it "Zip A.zip"
• Create another file name "Test.txt"
• Zip the file and name it "ZipB.zip"
• First unzip Zip A into document path
• Zip A succeed
• Now unzip Zip B with overwrite flag set to true
• Zip B fails
• Delete test.txt and unzip Zip B
• Zip B succeed

File name should be case insensitive as if there's an existing file name with capitalization, Mac's unarchive utility creates a new file. (e.g "Test 2.txt")

At the very least, even if it doesn't override, it should create a new file instead of throwing an error.