chore(deps): update dependency decimal to v3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
decimal	dependencies	major	^2.3.3 -> ^3.0.0

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Release Notes

a14n/dart-decimal (decimal)

v3.1.0

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• Bump intl to 0.20.0, lints to 5.0.0
• Bump SDK to 3.3.0 (enables wasm)

v3.0.2

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• Fix #​107: avoid exception when formatting decimal with NumberFormat.compact().

v3.0.1

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• Throw FormatException on formatter.parse('NaN').

v3.0.0

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• Add DecimalFormatter to deal with intl package. Your can now parse and format decimals.
• Add a dependency to intl.

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