0.16.0

Breaking changes (😱!!!):

• Remove shorthands for color, before, then, and else flags (#670, #664)

  Both then and target had the shorthand t, so the shorthand for then was removed.
  Since then, before, and else are all shared between several commands, it seemed
  natural to remove the shorthands for the other shared commands too, so as to not cause
  future shorthand name conflicts.
  A similar collision problem happened with the color flag, so its shorthand was removed.

• Pass main function argument to --run for alternate backends (#668)

  This is a braking change because now alternate backends are expected to accept
  an argument to their run flag. This change was coordinated among various backends
  so the migration should be relatively smooth, but you should check if your backend
  it able to support this.

New features:

• Upgrade to docs-search@v0.0.10, that introduces grouping by package in local docs (#679)
• Ignore .gitignored files in --watch by default - you can disable this with --allow-ignored (#665)
• Support upgrade-set for alternative package-set repositories (#671)

Bugfixes:

• Make the output of spago --version the same with spago version (#675)
• Ensure the existence of the global cache directory (#672, #667)

Other improvements:

• Docs: updated package addition/overriding syntax to use with syntax (#661, #663)
• Docs: fix Webpack template (#653)
• Docs: document how to pass arguments to main (#655)
• Error messages: do not print "Installation complete" if nothing was installed (#676)