feat(npm): add alias for `npm i -f` (#8454)

As documented in the README, `npm i -f` forces npm to install the specified packages from a remote
package registry, even if local copies exist on disk caches.

plugins/npm/README.md

@@ -15,6 +15,7 @@ plugins=(... npm)
 | `npmg`  | `npm i -g`                   | Install dependencies globally                                   |
 | `npmS`  | `npm i -S`                   | Install and save to dependencies in your package.json           |
 | `npmD`  | `npm i -D`                   | Install and save to dev-dependencies in your package.json       |
+| `npmF`  | `npm i -f`                   | Force install from remote registries ignoring local cache       |
 | `npmE`  | `PATH="$(npm bin)":"$PATH"`  | Run command from node_modules folder based on current directory |
 | `npmO`  | `npm outdated`               | Check which npm modules are outdated                            |
 | `npmV`  | `npm -v`                     | Check package versions                                          |

plugins/npm/npm.plugin.zsh

@@ -27,6 +27,9 @@ alias npmS="npm i -S "
 # npmd is used by https://github.com/dominictarr/npmd
 alias npmD="npm i -D "
 
+# Force npm to fetch remote resources even if a local copy exists on disk.
+alias npmF='npm i -f'
+
 # Execute command from node_modules folder based on current directory
 # i.e npmE gulp
 alias npmE='PATH="$(npm bin)":"$PATH"'