chore(build): Fix build in Node 10 by updating yarn.lock (#32)

[Build was breaking](https://travis-ci.org/eventbrite/eventbrite-sdk-javascript/builds/374217527) on `'node'` version in Travis because `'node'` now points to new v10 that that was released. One of gulp's dependencies didn't work correctly with it. See: gulpjs/gulp#2162 (comment).

The fix was to `yarn remove gulp gulp-debug` and `yarn add --dev gulp gulp-debug`. This bumped `gulp-debug` to a new version, but the main fix was the updates to `yarn.lock` to use new versions of packages specifically `natives@1.1.13`.

package.json

@@ -75,7 +75,7 @@
         "eslint-plugin-typescript": "^0.9.0",
         "gulp": "^3.9.1",
         "gulp-babel": "^7.0.1",
-        "gulp-debug": "^3.2.0",
+        "gulp-debug": "^4.0.0",
         "gulp-rename": "^1.2.2",
         "gulp-replace": "^0.6.1",
         "gulp-sourcemaps": "^2.6.4",
@@ -106,6 +106,9 @@
         }
     ],
     "jest": {
-        "projects": ["jest-test.config.js", "jest-lint.config.js"]
+        "projects": [
+            "jest-test.config.js",
+            "jest-lint.config.js"
+        ]
     }
 }