Update Ubuntu in Vagrant and add second CPU

Vagrantfile

@@ -2,9 +2,10 @@
 # vi: set ft=ruby :
 
 Vagrant.configure(2) do |config|
-  config.vm.box = "ubuntu/trusty64"
+  config.vm.box = "ubuntu/bionic64"
   config.vm.provider "virtualbox" do |v|
     v.memory = 8192
+    v.cpus = 2
   end
   config.vm.network "private_network", ip: "192.168.59.104"
   config.vm.network "forwarded_port", guest: 3035, host: 3035