fix(package): update babel to version 7.0.0

.yarnrc

@@ -1 +1,2 @@
 --install.no-lockfile true
+--ignore-engines true

babel-register.js

@@ -0,0 +1,6 @@
+/* eslint-disable import/no-unassigned-import */
+require('@babel/register')({
+  only: ['lib', 'cli.js', 'node_modules/got', 'node_modules/cacheable-request'],
+  presets: [['@babel/preset-env', {targets: {node: 'current'}, useBuiltIns: 'entry'}]],
+});
+require('@babel/polyfill');

bin/travis-deploy-once.js

@@ -1,10 +1,7 @@
 #!/usr/bin/env node
 
 /* eslint-disable import/no-unassigned-import */
-require('babel-register')({
-  only: /travis-deploy-once\/(lib|cli.js)|travis-deploy-once\/node_modules\/(got|cacheable-request)/,
-});
-require('babel-polyfill');
+require('../babel-register');
 
 require('../cli')().catch(() => {
   process.exitCode = 1;

index.js

@@ -1,6 +1,5 @@
 #!/usr/bin/env node
 /* eslint-disable import/no-unassigned-import */
-require('babel-register')({only: /travis-deploy-once\/lib|travis-deploy-once\/node_modules\/(got|cacheable-request)/});
-require('babel-polyfill');
+require('./babel-register');
 
 module.exports = require('./lib/travis-deploy-once');

package.json

@@ -5,22 +5,7 @@
   "author": "Stephan Bönnemann <stephan@boennemann.me>",
   "ava": {
     "require": [
-      "./test/helpers/ava-babel-require"
-    ]
-  },
-  "babel": {
-    "presets": [
-      [
-        "env",
-        {
-          "targets": {
-            "node": "current"
-          }
-        }
-      ]
-    ],
-    "plugins": [
-      "transform-object-rest-spread"
+      "./babel-register"
     ]
   },
   "bin": {
@@ -35,10 +20,10 @@
     }
   },
   "dependencies": {
-    "babel-plugin-transform-object-rest-spread": "^6.26.0",
-    "babel-polyfill": "^6.26.0",
-    "babel-preset-env": "^1.6.1",
-    "babel-register": "^6.26.0",
+    "@babel/core": "^7.0.0",
+    "@babel/polyfill": "^7.0.0",
+    "@babel/preset-env": "^7.0.0",
+    "@babel/register": "^7.0.0",
     "chalk": "^2.1.0",
     "execa": "^1.0.0",
     "got": "^9.1.0",