Update dependency intl to ^0.20.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
intl (source)	dependencies	minor	^0.16.1 -> ^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.

v0.19.0

Compare Source

• Update to CLDR v44.
• Update to CLDR v43.
• Add tryParse to NumberFormat.
• Add tryParse tryParseStrict tryParseLoose tryParseUtc to DateFormat.
• Add fallback for deprecated locales, such as he <-> iw.
• Switch QAR currency name to Riyal.
• Add license headers to some files.
• Update CVE currency symbol.
• Add EEEEE skeleton for DateFormat, closing #​176.
• Switch to 3.0.0 SDK.
• Fix issue #​483 about date parsing with a yy skeleton.
• Extract NumberParserBase abstract class

v0.18.1

• Update ruble sign and update corresponding test.
• Remove unimplemented timezone functionality.
• Update git path in pubspec.
• Update to CLDR v42.

v0.18.0

• Add support for minimumSignificantDigits / maximumSignificantDigits in
  NumberFormat.
• Add support for plural in NumberFormat.compact() ('2 milliards').
• Fix negative number formatting / parsing in NumberFormat.compact().
• Add optional parameter to NumberFormat.compact() to explicitly add sign
  even for positive values.
• Add decimalPatternDigits to NumberFormat which supports specifying the
  number of decimal digits in a decimal pattern.
• Update to cldr 40.
• Migrate to package:lints/recommended.yaml.
• Remove some instances of dynamic types from the API.
• Fix a bug caused by a typo in the plural rules calculation.
• Unify IntlStream and StringIterator into StringStack.
• Update to CLDR v41.
• Add new locales: as, bm, en_NZ, fur, mg, nyn.
• Remove unimplemented formatDuration and formatDurationFrom.
• Make shortLocale and canonicalizedLocale implementations smarter.

v0.17.0

Compare Source

• Migrate to null safety.
• Add @pragma('vm:prefer-inline') to Intl methods that already have
  @pragma('dart2js:tryInline'), for the same reason: to help omit message
  descriptions from compiled output.
• Breaking Change [#​123][]: Fix parsing of two-digit years to match the
  documented behavior. Previously a two-digit year would be parsed to a value
  in the range [0, 99]. Now it is parsed relative to the current date,
  returning a value between 80 years in the past and 20 years in the future.
• Use package:clock to get the current date/time.
• Fix some more analysis complaints.
• Update documentation to indicate that time zone specifiers are not yet
  implemented [#​264][].

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[renovate]

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: pubspec.lock

Command failed: flutter pub upgrade intl
The lower bound of "sdk: '>=2.10.0 <3.0.0'" must be 2.12.0'
or higher to enable null safety.

The current Dart SDK (3.2.3) only supports null safety.

For details, see https://dart.dev/null-safety

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: pubspec.lock

Command failed: flutter pub upgrade intl
The current Dart SDK version is 2.10.5.

Because covid19 depends on intl >=0.17.0-nullsafety which requires SDK version >=2.11.0-180.0.dev <3.0.0 or >=3.0.0 <4.0.0, version solving failed.
pub upgrade failed (1; Because covid19 depends on intl >=0.17.0-nullsafety which requires SDK version >=2.11.0-180.0.dev <3.0.0 or >=3.0.0 <4.0.0, version solving failed.)