Disable the "ffi" module test

spec/modules-spec.js

@@ -28,7 +28,10 @@ describe('modules support', () => {
       })
     })
 
-    describe('ffi', () => {
+    // TODO(alexeykuzmin): Disabled during the Chromium 62 (Node.js 9) upgrade.
+    // Enable it back when "ffi" module supports Node.js 9.
+    // https://github.com/electron/electron/issues/11274
+    xdescribe('ffi', () => {
       before(function () {
         if (!nativeModulesEnabled || process.platform === 'win32') {
           this.skip()

spec/package.json

@@ -23,7 +23,6 @@
     "yargs": "^6.0.0"
   },
   "optionalDependencies": {
-    "ffi": "2.2.0",
     "runas": "3.x"
   },
   "standard": {