Otherwise the language overwrites won't be merged correctly.

Signed-off-by: Simon Rüegg <simon.ruegg@vshn.ch>

This reverts commit 177c1c6b.

When running the `lockFileMaintenance`, the lock file is removed before it gets recreated. When the lock file is not present, npm creates a `package-lock.json` by default, so we need to rename it to `npm-shrinkwrap.json` when we want to get an updated version.

Closes #4760

It fixes unexpected "downgrading" behavior when updating normal
  versions like `0.9.21`, which are treated as caret ranges by cargo.

  For example if rangeStrategy is 'replace', an update like
  `0.9.21` -> `0.9.22` will result in newValue = `0.9.0`, because
  "caret range" `0.9.0` contains both `=0.9.21` and `=0.9.22`

Closes #4740