Code style fixes (#926)

Vagrantfile

@@ -6,18 +6,18 @@ VAGRANTFILE_API_VERSION = "2"
 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   config.vm.box = "monsenso/macos-10.13"
   config.vm.box_version = "1.0.0"
-  config.vm.network "forwarded_port", guest: 8080, host: 8080
+  config.vm.network("forwarded_port", guest: 8080, host: 8080)
 
   # Sync the fastlane-ci folder to the guest VM. The type of the synced folder
   # has to be rsync or nfs, because BSD-based guests do not support the
   # VirtualBox filesystem at this time.
-  config.vm.synced_folder ".", "/fastlane-ci", type: "nfs"
+  config.vm.synced_folder(".", "/fastlane-ci", type: "nfs")
 
   # NFS requires a host-only network to be created in order to work. This
   # requires admin password every time you run `vagrant up`.
-  config.vm.network "private_network", ip: "192.168.33.10"
+  config.vm.network("private_network", ip: "192.168.33.10")
 
-  config.vm.provider "virtualbox" do |vb|
+  config.vm.provider("virtualbox") do |vb|
     # Hide the VirtualBox GUI when booting the machine
     vb.gui = false
 
@@ -27,16 +27,16 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
 
     # No matter how much CPU is used in the VM, no more than 50% should be used
     # on the host machine
-    vb.customize ["modifyvm", :id, "--cpuexecutioncap", "50"]
+    vb.customize(["modifyvm", :id, "--cpuexecutioncap", "50"])
 
     # Because the USB 2.0 controller state is part of the saved VM state, the
     # VM cannot be started with USB 2.0 support on.
-    vb.customize ["modifyvm", :id, "--usb", "on"]
-    vb.customize ["modifyvm", :id, "--usbehci", "off"]
+    vb.customize(["modifyvm", :id, "--usb", "on"])
+    vb.customize(["modifyvm", :id, "--usbehci", "off"])
   end
 
   # Bootstrap the VM
-  config.vm.provision "shell",
-    path: "./vagrant-provision.sh",
-    privileged: false
+  config.vm.provision("shell",
+                      path: "./vagrant-provision.sh",
+                      privileged: false)
 end