Update adjustFormula

[TeeRenJing]

PR Details

Update adjustFormula function to take in another parameter to track position of row/column inserted.
Then with the excel formula parser, we can update the coordinates of the affected formula references.

Description

Added an extra parameter positionInserted so that we can do a comparison as to which reference needs to be updated by the offset.

Related Issue

#1615

Motivation and Context

So that when rows/columns are inserted, formula references are updated automatically as per the behaviour in Excel.

How Has This Been Tested

Also updated TestAdjustFormula in adjust_test.go to reflect the formula references auto updating.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #1698 (81c5fc0) into master (05689d6) will increase coverage by 0.00%.
The diff coverage is 100.00%.

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@@           Coverage Diff           @@
##           master    #1698   +/-   ##
=======================================
  Coverage   99.02%   99.02%           
=======================================
  Files          32       32           
  Lines       27745    27818   +73     
=======================================
+ Hits        27475    27548   +73     
  Misses        179      179           
  Partials       91       91           

Flag	Coverage Δ
unittests	99.02% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
adjust.go	99.22% <100.00%> (+0.17%)	⬆️
calc.go	99.25% <100.00%> (ø)
lib.go	98.46% <100.00%> (+<0.01%)	⬆️
rows.go	97.67% <100.00%> (ø)

[xuri]

LGTM. Thanks for your contribution. I have made some changes based on your branch. This feature will be released in the next version.