Switch to ava as a test runner (#1778)

* 0.17.1

* ava conversion

* ava for all

* Remove unneeded

* Remove Jest config

* Pacify package.json checker

jest.config.cjs

@@ -1,12 +0,0 @@
-// Copyright 2020-2022 @polkadot/phishing authors & contributors
-// SPDX-License-Identifier: Apache-2.0
-
-const config = require('@polkadot/dev/config/jest.cjs');
-
-module.exports = {
-  ...config,
-  moduleNameMapper: {},
-  setupFilesAfterEnv: ['<rootDir>/jest/setupEnv.cjs'],
-  testEnvironment: 'jsdom',
-  testTimeout: 2 * 60 * 1000
-};