fix(deps): update dependency intl to ^0.20.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
intl (source)	dependencies	minor	^0.19.0 -> ^0.20.0

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Release Notes

dart-lang/i18n (intl)

v0.20.0

Compare Source

• Fix caching of messages in CompositeMessageLookup.
• Type numberFormatSymbols as a Map<String, NumberSymbols>.
• Type dateTimeSymbolMap as a Map<String, DateSymbols>.
• Add example for pub.dev.
• Fix issues with AM/PM markers.
• Update to CLDR v44.1.
• Require Dart ^3.3
• Require package:web ^0.5.0.
• Support compiling to WASM.
• Update to and account for package:lints ^4.0.0.
• rtl Detection fix in bidi.dart for Kordi Sorani "ckb".
• Update to CLDR v45.

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