BREAKING CHANGE: The `installPkgDeps` API function is now called `install`. The old `install` is renamed to `installPkgs`. Unlike the old `install`, `installPkgs` does nothing, if the `pkgs` array contains no elements.
Divide the logic of prune into two functions: prune and prunePkgs. PR #372
Close #299
close #235
No breaking changes. An additional function exposed for package dependencies installation. close #125