update rvm version, ruby version, rails version

rails-install-ubuntu.sh

@@ -27,24 +27,23 @@ curl -sSL https://get.rvm.io | bash -s stable
 source ~/.rvm/scripts/rvm
 
 echo "Installs Ruby"
-rvm install 2.5.3
-rvm use 2.5.3 --default
+rvm install 2.6.3
+rvm use 2.6.3 --default
 
 echo "gem: --no-ri --no-rdoc" > ~/.gemrc
-gem install bundler
 gem install rails
 
 echo -e "\n- - - - - -\n"
 echo -e "Now we are going to print some information to check that everything is done:\n"
 
 
-echo -n "Should be sqlite 3.8.1 or higher: sqlite "
+echo -n "Should be sqlite 3.22.0 or higher: sqlite "
 sqlite3 --version
-echo -n "Should be rvm 1.26.11 or higher:         "
+echo -n "Should be rvm 1.29.8 or higher:         "
 rvm --version | sed '/^.*$/N;s/\n//g' | cut -c 1-11
-echo -n "Should be ruby 2.5.3:                "
+echo -n "Should be ruby 2.6.3:                "
 ruby -v | cut -d " " -f 2
-echo -n "Should be Rails 4.2.1 or higher:         "
+echo -n "Should be Rails 5.2.3 or higher:         "
 rails -v
 echo -e "\n- - - - - -\n"