Example code setup doesn't work with node v11.9.0

[kwikiel]

console.log(await spankSwap.getPrice())

index.js:20
console.log(await spankSwap.getPrice())
^^^^^

SyntaxError: missing ) after argument list
at new Script (vm.js:84:7)
at createScript (vm.js:264:10)
at Object.runInThisContext (vm.js:312:10)
at Module._compile (internal/modules/cjs/loader.js:694:28)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:745:10)
at Module.load (internal/modules/cjs/loader.js:626:32)
at tryModuleLoad (internal/modules/cjs/loader.js:566:12)
at Function.Module._load (internal/modules/cjs/loader.js:558:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:797:12)
at executeUserCode (internal/bootstrap/node.js:526:15)