v1.3.0

• Add data loaders.
• Add Node.js data loader (application/vnd.node.javascript cells).
• Add Python data loader (text/x-python cells).
• Add Interpreter to the standard library.
• Pre-formatted code blocks now scroll horizontally instead of wrapping.
• Fix erroneous syntax error when masking a known global variable such as window or Array.
• Fix the Vite plugin to not transform HTML files in .observable.