refactor(esm): converted the package to esm-only

BREAKING CHANGE: `@semantic-release/error` is now an ES Module

fixes #247

README.md

@@ -11,7 +11,7 @@ Any other type of error will be considered by [semantic-release](https://github.
 ## Usage
 
 ```js
-const SemanticReleaseError = require("@semantic-release/error");
+import SemanticReleaseError from "@semantic-release/error";
 
 // Default
 throw new SemanticReleaseError();

index.js

@@ -1,4 +1,4 @@
-module.exports = class SemanticReleaseError extends Error {
+export default class SemanticReleaseError extends Error {
  constructor(message, code, details) {
  super(message);
  Error.captureStackTrace(this, this.constructor);
@@ -7,4 +7,4 @@ module.exports = class SemanticReleaseError extends Error {
  this.details = details;
  this.semanticRelease = true;
  }
-};
+}

package.json

@@ -2,6 +2,7 @@
  "name": "@semantic-release/error",
  "description": "errors with more than just a message",
  "version": "0.0.0-development",
+ "type": "module",
  "author": "Stephan Bönnemann <[email protected]> (http://boennemann.me)",
  "ava": {
  "files": [
@@ -29,7 +30,7 @@
  "semantic-release"
  ],
  "license": "MIT",
- "main": "index.js",
+ "exports": "./index.js",
  "nyc": {
  "include": [
  "index.js"

test/helpers/inherited-error.js

@@ -1,11 +1,11 @@
-const SemanticReleaseError = require('../../index.js');
+import SemanticReleaseError from '../../index.js';
 
-module.exports = class InheritedError extends SemanticReleaseError {
+export default class InheritedError extends SemanticReleaseError {
  constructor(message, code) {
  super(message);
  Error.captureStackTrace(this, this.constructor);
  this.name = 'InheritedError';
  this.code = code;
  this.newProperty = 'newProperty';
  }
-};
+}

test/helpers/throw-error.js

@@ -1,5 +1,5 @@
-const SemanticReleaseError = require('../../index.js');
+import SemanticReleaseError from '../../index.js';
 
-module.exports = () => {
+export default () => {
  throw new SemanticReleaseError('message', 'code');
-};
+}

test/index.test.js

@@ -1,10 +1,10 @@
-const test = require('ava');
-const throwError = require('./helpers/throw-error.js');
-const InheritedError = require('./helpers/inherited-error.js');
-const throwInheritedError = require('./helpers/throw-inherited-error.js');
-const SemanticReleaseError = require('..');
+import test from 'ava';
+import throwError from './helpers/throw-error.js';
+import InheritedError from './helpers/inherited-error.js';
+import throwInheritedError from './helpers/throw-inherited-error.js';
+import SemanticReleaseError from '../index.js';
 
-test('Instanciates error', (t) => {
+test('Instantiates error', (t) => {
  const error = new SemanticReleaseError();
 
  t.true(error instanceof Error);