fix(yivi): switch to named imports — yivi-* packages dropped default exports

The 1.0.0 yivi packages export YiviCore, YiviWeb, and YiviClient as named
exports only. The previous `import Foo from '...'` syntax resolved to
module.default which is undefined, causing the runtime error
"r.default is not a constructor".

Author: rubenhensen

client/src/services/createIrmaSession.spec.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import YiviCore from '@privacybydesign/yivi-core';
+import { YiviCore } from '@privacybydesign/yivi-core';
 import { setupMocks, wrappedRender } from '@test/utils';
 import { act } from 'react-dom/test-utils';
 import createIrmaSession, { getConfig } from './createIrmaSession';

client/src/services/createIrmaSession.ts

@@ -1,8 +1,8 @@
 import axios from 'axios';
 import '@privacybydesign/yivi-css';
-import YiviCore from '@privacybydesign/yivi-core';
-import YiviWeb from '@privacybydesign/yivi-web';
-import YiviClient from '@privacybydesign/yivi-client';
+import { YiviCore } from '@privacybydesign/yivi-core';
+import { YiviWeb } from '@privacybydesign/yivi-web';
+import { YiviClient } from '@privacybydesign/yivi-client';
 import userAgent from './userAgent';
 
 // Types
@@ -99,7 +99,7 @@ const createIrmaSession = (
     callBackMapping?: IStateChangeCallbackMapping,
     alwaysShowQRCode = false,
     language = 'nl'
-): typeof YiviCore => {
+): InstanceType<typeof YiviCore> => {
     const queryString = Object.keys(query)
         .map((key, index) => `${index === 0 ? '?' : ''}${key}=${(query as any)[key]}`)
         .join('&');

client/src/services/createIrmaVoteSession.ts

@@ -1,6 +1,6 @@
-import YiviCore from '@privacybydesign/yivi-core';
-import YiviWeb from '@privacybydesign/yivi-web';
-import YiviClient from '@privacybydesign/yivi-client';
+import { YiviCore } from '@privacybydesign/yivi-core';
+import { YiviWeb } from '@privacybydesign/yivi-web';
+import { YiviClient } from '@privacybydesign/yivi-client';
 import { IrmaAbortOnCancel, isMobile, IStateChangeCallbackMapping, IStateMachine } from '@services/createIrmaSession';
 import { HOLDER_ELEMENT_ID } from '../pages/Vote';