* perf: validating the node_modules structure to a specified depth
Ref #722
* feat: adding an update boolean property to the install API
BREAKING CHANGE:
Dependencies won't be updated when `update` is `false`.
It doesn't matter what the value of `depth` is.
`depth` is used for specifying how deep should the install
algorithm analize the dependency tree.
Ref #722
* refactor: merge new resolved deps with the previous
* fix: global installation always works now
Close#711
* refactor: avoid using `read-pkg-up`
BREAKING CHANGE:
API should be called in the folder that has a package.json file.
pnpm won't search up for a package.json file.
Close#67
* docs(API): update
* refactor: write-pkg created dir on its own
* refactor: rename `globalDir` to `globalPrefix`
* feat: saving the global package in <global prefix>/pnpm-global
BREAKING CHANGE:
`rc` is not used to get configs.
BREAKING CHANGE:
`.pnpmrc` files are ignored
BREAKING CHANGE:
configs in json format are not supported
BREAKING CHANGE:
`--config` argument renamed to `--userconfig`
Close#696, Close#40
