Fixing yarn installation

script/solve_npm_yarn

+
+#! /bin/bash 
+
+function solve_npm_yarn() {
+source script/show_solutions
+
+pc_install_command "$pcman"
+commands[0]="su -c \"npm install yarn -g\""
+commands[1]="sudo npm install yarn -g"
+possible_solutions "${commands[@]}"
+}
+