test(email-plugin): Use local imports to speed up tests

packages/email-plugin/jest.config.js

@@ -17,6 +17,7 @@ module.exports = {
         'ts-jest': {
             tsConfig: {
                 allowJs: true,
+                skipLibCheck: true,
             },
         },
     },

packages/email-plugin/src/plugin.spec.ts

@@ -1,9 +1,10 @@
 /* tslint:disable:no-non-null-assertion */
-import { LanguageCode } from '@vendure/common/lib/generated-types';
-import { DEFAULT_CHANNEL_CODE } from '@vendure/common/lib/shared-constants';
-import { EventBus, Order, OrderStateTransitionEvent, VendureEvent } from '@vendure/core';
 import path from 'path';
 
+import { LanguageCode } from '../../common/src/generated-types';
+import { DEFAULT_CHANNEL_CODE } from '../../common/src/shared-constants';
+import { EventBus, Order, OrderStateTransitionEvent, VendureEvent } from '../../core';
+
 import { orderConfirmationHandler } from './default-email-handlers';
 import { EmailEventHandler, EmailEventListener } from './event-listener';
 import { EmailPlugin } from './plugin';