Update Babel dependencies to latest and fix CI. (#315)

Update Babel dependencies to latest and fix CI.

node-tests/addon-test.js

@@ -152,7 +152,7 @@ describe('ember-cli-babel', function() {
         });
       }));
 
-      it("does not remove regeneratorRuntime.async helper function when used together with debug-macros", co.wrap(function* () {
+      it("does not remove _asyncToGenerator helper function when used together with debug-macros", co.wrap(function* () {
         input.write({
           "foo.js": stripIndent`
             import { assert } from '@ember/debug';
@@ -167,7 +167,7 @@ describe('ember-cli-babel', function() {
 
         let contents = output.read()['foo.js'];
 
-        expect(contents).to.include('regeneratorRuntime.async');
+        expect(contents).to.include('function _asyncToGenerator');
       }));
 
       it("allows @ember/debug to be consumed via both debug-macros and ember-modules-api-polyfill", co.wrap(function* () {
@@ -186,7 +186,7 @@ describe('ember-cli-babel', function() {
         let contents = output.read()['foo.js'];
 
         expect(contents).to.not.include('@ember/debug');
-        expect(contents).to.include('regeneratorRuntime.async');
+        expect(contents).to.include('function _asyncToGenerator');
         expect(contents).to.include('Ember.inspect;');
         expect(contents).to.not.include('assert');
       }));

package.json

@@ -40,14 +40,14 @@
     "test:node:debug": "mocha debug node-tests"
   },
   "dependencies": {
-    "@babel/core": "^7.7.0",
-    "@babel/plugin-proposal-class-properties": "^7.7.0",
-    "@babel/plugin-proposal-decorators": "^7.7.0",
-    "@babel/plugin-transform-modules-amd": "^7.5.0",
-    "@babel/plugin-transform-runtime": "^7.6.0",
+    "@babel/core": "^7.7.7",
+    "@babel/plugin-proposal-class-properties": "^7.7.4",
+    "@babel/plugin-proposal-decorators": "^7.7.4",
+    "@babel/plugin-transform-modules-amd": "^7.7.5",
+    "@babel/plugin-transform-runtime": "^7.7.6",
     "@babel/polyfill": "^7.7.0",
-    "@babel/preset-env": "^7.7.0",
-    "@babel/runtime": "^7.7.0",
+    "@babel/preset-env": "^7.7.7",
+    "@babel/runtime": "^7.7.7",
     "amd-name-resolver": "^1.2.1",
     "babel-plugin-debug-macros": "^0.3.0",
     "babel-plugin-ember-modules-api-polyfill": "^2.12.0",