fix: Number as preRelease are not supported

[ValentinVignal]

Is there an existing issue for this?

• I have searched the existing issues.

Version

6.3.3

Description

If I have a package number 0.0.0-6 and I try to release 0.0.0-7, melos publish fails:

type 'int' is not a subtype of type 'String' in type cast
#0      _PublishMixin._getLatestPublishedVersionForPackages.<anonymous closure> (package:melos/src/commands/publish.dart:146:45)
<asynchronous suspension>
#1      Pool.forEach.run (package:pool/pool.dart:183:19)
<asynchronous suspension>
#2      Pool.withResource (package:pool/pool.dart:127:14)
<asynchronous suspension>
#3      Future.wait.<anonymous closure> (dart:async/future.dart:525:21)
<asynchronous suspension>
#4      Pool.forEach.onListen.<anonymous closure> (package:pool/pool.dart:203:23)
<asynchronous suspension>
#5      _StreamController.close (dart:async/stream_controller.dart:640:3)
<asynchronous suspension>
#6      _nullDataHandler (dart:async/stream_impl.dart:549:1)
<asynchronous suspension>

It looks like pub_semver is casting to int when possible

https://github.com/dart-lang/tools/blob/ecd7dd523c8a5761f337eedce8878b092996a75c/pkgs/pub_semver/lib/src/version.dart#L158-L167

 /// Splits a string of dot-delimited identifiers into their component parts.
 ///
 /// Identifiers that are numeric are converted to numbers.
 static List<Object> _splitParts(String text) => text
     .split('.')
     .map((part) =>
         // Return an integer part if possible, otherwise return the string
         // as-is
         int.tryParse(part) ?? part)
     .toList();

But melos casts it as a string

melos/packages/melos/lib/src/commands/publish.dart

Lines 151 to 155 in fdcd6b9

	if (package.version.isPreRelease) {
	final preid = package.version.preRelease.length == 4
	? package.version.preRelease[2] as String
	: package.version.preRelease[0] as String;
	final versionsWithPreid = versions

Steps to reproduce

Try to publish a package from version 0.0.0-6 to 0.0.0-7

Expected behavior

Support numbers as prereleases

Screenshots

No response

Additional context and comments

No response

Other

• I'm interested in working on a PR for this.