Add a property to force re-install of dependencies.

[ilg-ul]

Allow to reinstall dependencies over existing ones.

This is particularly useful during development, when using github: dependencies, since they no longe require artificial pre-release versions.

{
  "xpack": {
        "devDependencies": {
          "@micro-os-plus/build-helper": {
            "specifier": "github:micro-os-plus/build-helper-xpack#xpack-develop",
            "local": "link",
            "platforms": "all",
            "force": true
          }
        }
  }
}