Fix: scientific notation zerofill issues

[phperic]

PR Details

I found a issue about cell value

Description

I found an issue with getting values from cells with scientific notation as their format.

Related Issue

#1709

Motivation and Context

How Has This Been Tested

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

• [ x] My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• [x ] 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 #1710 (1a0e0dc) into master (7291e78) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##           master    #1710      +/-   ##
==========================================
- Coverage   99.03%   99.03%   -0.01%     
==========================================
  Files          32       32              
  Lines       28000    27999       -1     
==========================================
- Hits        27730    27729       -1     
  Misses        179      179              
  Partials       91       91              

Flag	Coverage Δ
unittests	99.03% <100.00%> (-0.01%)	⬇️

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

Files	Coverage Δ
numfmt.go	100.00% <100.00%> (ø)

[xuri]

LGTM, thanks for your contribution.