Fix API mock in verification test

app/soapbox/__mocks__/api.ts

@@ -9,7 +9,7 @@ export const __stub = (func: Function) => mocks.push(func);
 export const __clear = (): Function[] => mocks = [];
 
 const setupMock = (axios: AxiosInstance) => {
-  const mock = new MockAdapter(axios);
+  const mock = new MockAdapter(axios, { onNoMatch: 'throwException' });
   mocks.map(func => func(mock));
 };
 

app/soapbox/features/verification/__tests__/index.test.tsx

@@ -2,7 +2,8 @@ import { Map as ImmutableMap } from 'immutable';
 import React from 'react';
 import { Route, Switch } from 'react-router-dom';
 
-import { __stub } from '../../../__mocks__/api';
+import { __stub } from 'soapbox/api';
+
 import { render, screen } from '../../../jest/test-helpers';
 import Verification from '../index';