replace jest with ava

node_modules/time-zone/index.js

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+'use strict';
+module.exports = date => {
+	const offset = (date || new Date()).getTimezoneOffset();
+	const absOffset = Math.abs(offset);
+	const hours = Math.floor(absOffset / 60);
+	const minutes = absOffset % 60;
+	const minutesOut = minutes > 0 ? ':' + ('0' + minutes).slice(-2) : '';
+
+	return (offset < 0 ? '+' : '-') + hours + minutesOut;
+};

node_modules/time-zone/license

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+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

node_modules/time-zone/package.json

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+{
+  "name": "time-zone",
+  "version": "1.0.0",
+  "description": "Pretty time zone: `+2` or `-9:30`",
+  "license": "MIT",
+  "repository": "sindresorhus/time-zone",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=4"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "timezone",
+    "utc",
+    "time",
+    "pretty",
+    "human",
+    "date",
+    "iso",
+    "zone"
+  ],
+  "devDependencies": {
+    "ava": "*",
+    "xo": "*"
+  }
+}

node_modules/time-zone/readme.md

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+# time-zone [![Build Status](https://travis-ci.org/sindresorhus/time-zone.svg?branch=master)](https://travis-ci.org/sindresorhus/time-zone)
+
+> Pretty [time zone](https://en.wikipedia.org/wiki/Time_zone): `+2` or `-9:30`
+
+
+## Install
+
+```
+$ npm install --save time-zone
+```
+
+
+## Usage
+
+```js
+const timeZone = require('time-zone');
+
+// current time zone (in Norway)
+timeZone();
+//=> '+2'
+
+// time zone in February (in Norway)
+timeZone(new Date(2016, 1, 1));
+//=> '+1'
+
+// current time zone (in French Polynesia)
+timeZone();
+//=> '-9:30'
+```
+
+
+## API
+
+### timeZone([date])
+
+#### date
+
+Type: `Date`<br>
+Default: `new Date()`
+
+Custom date.
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)