Update the plugins managment. Add the function 'omz-plugin' (inspired from bash-it)

plugins/available/npm/npm.plugin.zsh

@@ -0,0 +1,46 @@
+(( $+commands[npm] )) && {
+    __NPM_COMPLETION_FILE="${ZSH_CACHE_DIR}/npm_completion"
+
+    if [[ ! -f $__NPM_COMPLETION_FILE ]]; then
+        npm completion >! $__NPM_COMPLETION_FILE 2>/dev/null
+        [[ $? -ne 0 ]] && rm -f $__NPM_COMPLETION_FILE
+    fi
+
+    [[ -f $__NPM_COMPLETION_FILE ]] && source $__NPM_COMPLETION_FILE
+
+    unset __NPM_COMPLETION_FILE
+}
+
+# Install dependencies globally
+alias npmg="npm i -g "
+
+# npm package names are lowercase
+# Thus, we've used camelCase for the following aliases:
+
+# Install and save to dependencies in your package.json
+# npms is used by https://www.npmjs.com/package/npms
+alias npmS="npm i -S "
+
+# Install and save to dev-dependencies in your package.json
+# npmd is used by https://github.com/dominictarr/npmd
+alias npmD="npm i -D "
+
+# Execute command from node_modules folder based on current directory
+# i.e npmE gulp
+alias npmE='PATH="$(npm bin)":"$PATH"'
+
+# Check which npm modules are outdated
+alias npmO="npm outdated"
+
+# Check package versions
+alias npmV="npm -v"
+
+# List packages
+alias npmL="npm list"
+
+# Run npm start
+alias npmst="npm start"
+
+# Run npm test
+alias npmt="npm test"
+