Feature/Bug/Research: Handle collapsed files in zip bundling.

[ryan-roemer]

If we have ../node_modules/foo and node_modules/foo in files in a package, they get collapsed in the zip file as node_modules/foo. Multiple entries with zipinfo but only a single file when expanded on disk.

Task:

• Research the situation to better understand what's going on.
• Add option or something to flag detected collapsed files.

Remedies:

• Potentially error out if detected. E.g., custom.jetpack.collapsed.bail = true
• Potentially (long shot) heuristically "fix" the problem.
• Option for "winners" if multiple detected. E.g.

  custom:
    jetpack:
      collapsed:
        resolutions:
          # <GROUP>: <WINNER PATH>
          node_modules/lodash: ../node_modules/lodash
  

[ryan-roemer]

Added detection and jetpack.collapsed.bail option in serverless-jetpack@0.10.2