feat: round numbers

.travis.yml

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+sudo: false
+language: node_js
+node_js:
+  - '10'
+  - '12'
+  - '13'
+after_success: npm run coverage

README.md

@@ -1 +1,47 @@
-# round
+# Round
+[![NPM](https://img.shields.io/npm/v/@alvarocastro/round.svg)](https://www.npmjs.com/package/@alvarocastro/round)
+[![Build Status](https://travis-ci.org/alvarocastro/round.svg?branch=master)](https://travis-ci.org/alvarocastro/round)
+[![codebeat badge](https://codebeat.co/badges/9451ded5-f5f8-44e1-9894-d627b2fc1a7c)](https://codebeat.co/projects/github-com-alvarocastro-round-master)
+[![Coverage Status](https://coveralls.io/repos/github/alvarocastro/round/badge.svg?branch=master)](https://coveralls.io/github/alvarocastro/round?branch=master)
+[![XO code style](https://img.shields.io/badge/code_style-XO-5ed9c7.svg)](https://github.com/xojs/xo)
+
+Round values up to an amount of decimals, avoiding the floating point weirdness of JavaScript.
+
+- [Install](#install)
+- [Usage](#usage)
+
+## Install
+
+```bash
+npm install @alvarocastro/round
+```
+
+## Usage
+
+```js
+const round = require('@alvarocastro/round');
+
+round(1.005);
+// => 1.01
+round(2.2222, 1);
+// => 1.1
+round(3, 5);
+// => 3
+```
+
+### round(number[, decimals = 2])
+
+Returns the value rounded up to a given amout of decimals.
+
+#### number
+
+Type: `Number`
+
+Value to round.
+
+#### decimals
+
+Type: `Number`<br>
+Default: 2
+
+The amount of decimals to round the number to.

index.js

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+const round = function (number, decimals = 2) {
+	const p = 10 ** decimals;
+	const fpFix = Number.EPSILON * (number < 0 ? -1 : 1);
+
+	return Math.round((number + fpFix) * p) / p;
+};
+
+module.exports = round;