Implement Node.js RFC0014: Support for Yarn "Berry"

[ryanmoran]

RFC

Summary

The Paketo Node.js Buildpack supports building apps which use Yarn as a package/project management tool. Over the last few years, the developers of Yarn have released new major versions (v2 and greater), collectively called Yarn "Berry", which represent a completely new direction for managing dependencies in Node.js projects. Chief among the changes is the introduction of Plug 'n Play, a system which removes the reliance on node_modules and can eliminate the need to run yarn install at all. The Yarn implementation buildpacks do not currently support building apps which use Berry.

There have been quite a number of changes in the behaviour of Yarn with the advent of Berry. Along with performance improvements and optimizations, many CLI operations and methods of configuration have been deprecated or removed, including those crucial to the functioning of the buildpack as it exists today.

Issues

• Implement RFC 0014: Enable Support for Yarn Berry yarn-install#370
• Implement RFC 0014: Enable support for running Yarn Berry apps yarn-start#223
• Implement RFC 0014: Enable support for Yarn Berry node-run-script#118
• Add Yarn Berry apps to Node.js samples samples#377