LOOKUP does not handle Array form correctly

[stanim]

Description

There are two ways to use LOOKUP: Vector form and Array form. For more info, see https://support.microsoft.com/en-us/office/lookup-function-446d94af-663b-451d-8251-369d5e3864cb

Excelize seems to support both, but the Array form does not work as expected. It returns the lookup value instead of the result

Steps to reproduce the issue:

1. Add these two tests to calc_test.go, they should be equivalent and return the same result:

	mathCalc := map[string]string{
                ...
		"=LOOKUP(E3,E2:E5,F2:F5)":      "22100",
		"=LOOKUP(E3,E2:F5)":            "22100",

I've done this in my lookup-array-from branch: https://github.com/stanim/excelize/blob/lookup-array-form/calc_test.go#L1135

2. Run go test.

Describe the results you received:

> go test
--- FAIL: TestCalcCellValue (7.87s)
    calc_test.go:1218: 
        	Error Trace:	calc_test.go:1218
        	Error:      	Not equal: 
        	            	expected: "22100"
        	            	actual  : "North 2"
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1 +1 @@
        	            	-22100
        	            	+North 2
        	Test:       	TestCalcCellValue
        	Messages:   	=LOOKUP(E3,E2:F5)

Describe the results you expected:

I expected the tests to pass.

Output of go version:

go version go1.16.7 linux/amd64

Excelize version or commit ID:

> git log
commit a55f354eb3d0c6c1b9a543ff8ff98227aa6063a6 (HEAD -> lookup, origin/master, origin/HEAD, master)
Author: xuri <[email protected]>
Date:   Tue Aug 17 00:01:44 2021 +0800

    This closes #989, closes #990
    
    New API: `SetRowStyle` support for set style for the rows
    Update documentation for the `GetRows`, `SetCellStyle` and `SetColStyle`

Environment details (OS, Microsoft Excel™ version, physical, etc.):

• OS: Archlinux 5.13.10-arch1-1
• WPS Spreadsheets (version wps-office 11.1.0.10702-1)
• LibreCalc (version libreoffice-fresh 7.1.5-2)

[stanim]

I've prepared a pull request #996 against the master branch to fix this issue.

How will this land in the v2 branch, which I use?