Snowpack: Support multiple "include" globs

[FredKSchott]

Original Discussion: https://www.pika.dev/npm/snowpack/discuss/97
/cc @stefanfrede

Today, we only support a single "include" glob for auto import scanning. We should support multiple includes if the user wants to provide them.

[sdemjanenko]

Does it make sense to switch to globby? It looks like there is a 4.5 year old issue in glob (https://github.com/isaacs/node-glob/issues/217) which asks for support of multiple patterns. Globby's documentation (https://github.com/sindresorhus/globby#globbysyncpatterns-options) suggests it supports an array of patterns.

[FredKSchott]

Solved in Snowpack v2:

• your entire application is now scanned/supported by default
• 'scripts' can be used to configure your dev environment to only include certain directories via the "mount" script
• you can mount as many directories to your project as you'd like