update: Fix updating of npm globals

There's a long trail here (from npm/npm#11534 to npm/cli#755) but basically, npm installs globals as if there were a caret given in the version, so that `npm upgrade -g` won't ever do anything beyond that semver.  Thus, we need to actually pass each individual package name to `npm install` (note: install, not upgrade) in order to actually update packages.

bin/update

@@ -144,15 +144,16 @@ fi
 
 if [[ -z $npm_all_flag ]]; then
     checking 'npm nodejs packages (global)'
+    # Means I miss out on the cool coloring in the output
     npm_todo=$(npm outdated --global)
     if [[ -n $npm_todo ]]; then
 	echo "$npm_todo"
 	if [[ -z $npm_flag ]]; then
 	    updating 'npm nodejs packages (global)'
-	    sudo npm upgrade --global;
+	    # skip column headers, pass package names to npm install since
+	    # global implies caret semver https://github.com/npm/cli/issues/746
+	    echo "$npm_todo" | tail -n +2 | cut -f 1 -d ' ' | xargs npm install --global
 	fi
-	checking 'npm for unupdated packages FIXME TODO'
-	npm outdated --global
     else
 	echo -e "${Color_Green}npm nodejs packages already up-to-date!${Color_zOff}"
     fi