[ISSUE#149] MXN fraction changed to 4

[laughing-nerd]

I have addressed issue#149 and changed the fraction for MXN from 2 to 4. Please review the PR and let me know if any other changes are required.

Summary by Sourcery

Update the MXN currency fraction from 2 to 4 in the currency configuration to resolve issue #149.

Bug Fixes:

• Change the fraction for the MXN currency from 2 to 4 to address issue MXN fraction is invalid, must be 4 #149.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request addresses issue #149 by changing the fraction for the Mexican Peso (MXN) currency from 2 to 4 in the currency.go file. This is a simple, focused change that affects only one line of code.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated the fraction for Mexican Peso (MXN) from 2 to 4	Changed the Fraction value from 2 to 4 for the MXN currency in the currencies map	currency.go

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[sourcery-ai]

Hey @laughing-nerd - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider adding a brief comment explaining why MXN uses 4 decimal places instead of the more common 2. This will help future maintainers understand the reasoning behind this specific configuration.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[Rhymond]

Can you include official reference where it states of MXN currency fraction?