Update FML to get Java Core Mods and early-loading config support

[shartte]

Also updates BootStrapLauncher to 2.0.2, which introduces more leniency when modules are already on the module-path, and improves error reporting when versions don't match.

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: 90425c10f764030c70105e7d436d9e95fcb78ecc.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged:testframework:20.6.104-beta-pr-1054-bump-fml
• 📦 net.neoforged:neoforge:20.6.104-beta-pr-1054-bump-fml

Repository Declaration

In order to use the artifacts published by the PR, add the following repository to your buildscript:

repositories {
    maven {
        name 'Maven for PR #1054' // https://github.com/neoforged/NeoForge/pull/1054
        url 'https://prmaven.neoforged.net/NeoForge/pr1054'
        content {
            includeModule('net.neoforged', 'testframework')
            includeModule('net.neoforged', 'neoforge')
        }
    }
}

MDK installation

In order to setup a MDK using the latest PR version, run the following commands in a terminal.
The script works on both *nix and Windows as long as you have the JDK bin folder on the path.
The script will clone the MDK in a folder named NeoForge-pr1054.
On Powershell you will need to remove the -L flag from the curl invocation.

mkdir NeoForge-pr1054
cd NeoForge-pr1054
curl -L https://prmaven.neoforged.net/NeoForge/pr1054/net/neoforged/neoforge/20.6.104-beta-pr-1054-bump-fml/mdk-pr1054.zip -o mdk.zip
jar xf mdk.zip
rm mdk.zip || del mdk.zip

To test a production environment, you can download the installer from here.