feat: Support ESM properly

* Build ESM output to dist
* Announce ESM exports in package.json
* Add exports for lookup-convert, parse-format, data and limited data
* Replace `commander` with a hand-coded command-line parsing

* Upgrade dev dependencies
* Replace npm with pnpm (worked slower)
* Replace cpy-cli with cp.js (started to create wrong paths)
* Replace eslint with denolint (worked slower)
* Replace coveralls with codecov (they cancel accounts)
* Replace travis with github actions (more work to maintain)

BREAKING CHANGE: The initial ESM support exposed the sources at paths like `src/index.js` and worked only if you used a bundler. **The proper ESM support** has been provided by files built to paths like `dist/index.mjs`, which are mapped to export modules in `package.json`. For example, if you imported the main module like this:

    import { getZonedTime } from ./node_modules/timezone-support/src/index.js

Change it to this:

    import { getZonedTime } from timezone-support

See also sections "Loading" and "Modules" in `API.md`.

**Replacing `commander` in `create-timezone-data`** with a hand-coded command-line parsing should not affect anybody, because the command-line format did not change, but there might be some undetected difference.

Declaring export modules in `package.json` **works reliably since Node.js 14.8**, but the rest of the source code and loading the files from the `dist` directory directly should work since Node.js 6. The script `create-timezone-data` needs the `fs/promises` implementation, which was introduced in Node.js 14.

Author: prantlf

.coveralls.yml

@@ -0,0 +1,5 @@
+{
+  "rules": {
+    "tags": ["recommended"]
+  }
+}

.denolint.json

@@ -0,0 +1,46 @@
+name: Test or Release
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test-or-release:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Sources
+      uses: actions/checkout@v2
+    - name: Install Node
+      uses: actions/setup-node@v2
+      with:
+        node-version: 'lts/*'
+        registry-url: 'https://registry.npmjs.org'
+    - name: Install PNPM
+      uses: pnpm/action-setup@v2
+      with:
+        version: '>=6'
+        run_install: |
+          - args: [--frozen-lockfile, --no-verify-store-integrity]
+    - name: Test
+      run: npm test
+    - name: Examples
+      run: |
+        cd examples/nodejs
+        pnpm i --frozen-lockfile --no-verify-store-integrity
+        npm test
+        cd ../browser-separate
+        pnpm i --frozen-lockfile --no-verify-store-integrity
+        npm test
+        cd ../browser-bundled
+        pnpm i --frozen-lockfile --no-verify-store-integrity
+        npm test
+    - name: Coverage
+      uses: codecov/codecov-action@v2
+    - name: Publish
+      uses: cycjimmy/semantic-release-action@v2
+      with:
+        semantic_version: 18
+        branches: master
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.eslintrc.yml

@@ -7,4 +7,4 @@ src/lookup/data*.js
 src/index-*.d.ts
 src/lookup/data-*.d.ts
 test/browser
-test/typings.test.js
+test/types.test.js

.github/workflows/ci.yml

@@ -6,6 +6,7 @@
   "search.exclude": {
     "**/src/lookup/data*.js": true,
     "**/dist/**": true,
+    "**/out/**": true,
     "**/test/browser/**": true,
     "**/test/typings.test.js": true
   }

.gitignore

@@ -1,20 +1,19 @@
 # Time Zone Support
-[![NPM version](https://badge.fury.io/js/timezone-support.png)](http://badge.fury.io/js/timezone-support)
-[![Build Status](https://travis-ci.org/prantlf/timezone-support.png)](https://travis-ci.org/prantlf/timezone-support)
-[![Coverage Status](https://coveralls.io/repos/github/prantlf/timezone-support/badge.svg?branch=master)](https://coveralls.io/github/prantlf/timezone-support?branch=master)
+
+[![Latest version](https://img.shields.io/npm/v/timezone-support)
+ ![Dependency status](https://img.shields.io/librariesio/release/npm/timezone-support)
+](https://www.npmjs.com/package/timezone-support)
+[![Coverage](https://codecov.io/gh/prantlf/timezone-support/branch/master/graph/badge.svg)](https://codecov.io/gh/prantlf/timezone-support)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/9f1034029c0747a980cd49f64f16338b)](https://www.codacy.com/app/prantlf/timezone-support?utm_source=github.com&utm_medium=referral&utm_content=prantlf/timezone-support&utm_campaign=Badge_Grade)
-[![Dependency Status](https://david-dm.org/prantlf/timezone-support.svg)](https://david-dm.org/prantlf/timezone-support)
-[![devDependency Status](https://david-dm.org/prantlf/timezone-support/dev-status.svg)](https://david-dm.org/prantlf/timezone-support#info=devDependencies)
-[![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com)
 
-[![NPM Downloads](https://nodei.co/npm/timezone-support.png?downloads=true&stars=true)](https://www.npmjs.com/package/timezone-support)
 
 Lightweight time zone listing and date converting. Intended for adding time zone support to high-level date libraries, but also for direct application usage.
 
 * Tiny code base - 4.6 KB minified, 1.7 KB gzipped. Do not pack unnecessary weight in your application.
 * Packed time zone data - 924 KB minified, 33.6 KB gzipped. Single time zones are unpacked on demand.
 * Smaller bundles of code with limited data - 1900-2050 (206 kB minified, 25.4 kB gzipped), 1970-2038 (141 kB minified, 15.8 kB gzipped) and 2012-2022 (31.3 KB minified, 8.25 kB gzipped).
-* Generated from the official time zone database version 2019a. Canonical time zone names, aliases, UTC offsets, and daylight-saving time changes.
+* Generated from the official time zone database version 2022f. Canonical time zone names, aliases, UTC offsets, and daylight-saving time changes.
+* ESM, UMD and CJS module formats provided.
 * Minimal interface for time zone lookup and conversions. Parsing, formatting and manipulating dates is usually the task for a higher-level date library.
 
 **Attention**: exported identifiers in vanilla browser modules changed in the version 2.0.0. See the [migration guide] for more information.
@@ -56,13 +55,11 @@ const nativeDate = new Date(getUnixTime(berlinTime, berlin))
 
 ## Installation and Getting Started
 
-This module can be installed in your project using [NPM] or [Yarn]. Make sure, that you use [Node.js] version 6 or newer.
-
-```sh
-$ npm i timezone-support --save
-```
+This module can be installed in your project using [NPM], [PNPM] or [Yarn]. Make sure, that you use [Node.js] version 14.8 or newer.
 
 ```sh
+$ npm i timezone-support
+$ pnpm i timezone-support
 $ yarn add timezone-support
 ```
 
@@ -72,7 +69,7 @@ Functions are exposed as named exports from the package modules, for example:
 const { findTimeZone, getZonedTime } = require('timezone-support')
 ```
 
-You can read more about the [module loading](./docs/API.md#loading) in other environments, like with ES6 or in web browsers. [Usage scenarios](./docs/usage.md#usage-scenarios) demonstrate applications of this library in typical real-world scenarios. [Design concepts](./docs/design.md#design-concepts) explain the approach to time zone handling taken by tni library and types of values used ion the interface. [Generating custom time zone data](./docs/usage.md#generate-custom-time-zone-data) will allow you to save the overall package size by limiting the supported year span. Finally, the [API reference](./docs/API.md#api-reference) lists all functions with a description of their functionality.
+You can read more about the [module loading] in other environments, like with ES6 or in web browsers. [Usage scenarios] demonstrate applications of this library in typical real-world scenarios. [Design concepts] explain the approach to time zone handling taken by tni library and types of values used ion the interface. [Generating custom time zone data] will allow you to save the overall package size by limiting the supported year span. Finally, the [API reference] lists all functions with a description of their functionality.
 
 You can see [complete sample applications] too, which can help you start with integration of this library.
 
@@ -85,34 +82,24 @@ You can see [complete sample applications] too, which can help you start with in
 
 In lieu of a formal styleguide, take care to maintain the existing coding style.  Add unit tests for any new or changed functionality. Lint and test your code using Grunt.
 
-## Release History
-
-* 2018-06-11   v2.0.2   Upgrade the time zone database to the version 2019a.
-* 2018-06-11   v2.0.1   Default to midnight, if the time part of a date is missing.
-* 2018-06-10   v2.0.0   Use proper identifiers in vanilla browser modules.
-* 2018-11-17   v1.8.0   Include time zone data for years 1970-2038.
-* 2018-11-17   v1.7.0   Include full time zone data separately loadable.
-* 2018-11-06   v1.6.0   Upgrade the time zone database to the version 2018g.
-* 2018-10-08   v1.5.5   Fix compatibility with IE. Thanks, [Andrii](https://github.com/AndriiDidkivsky)!
-* 2018-10-06   v1.5.0   Add TypeScript export declarations.
-* 2018-09-30   v1.4.0   Add limited data for just the current decade - years 2012-2022.
-* 2018-09-18   v1.3.0   Maintain the property dayOfWeek in the time object.
-* 2018-09-16   v1.2.0   Add a new getUTCOffset method for more lightweight integrations.
-* 2018-09-03   v1.1.0   Set the property epoch to the time object.
-* 2018-09-02   v1.0.0   Initial release
-
 ## License
 
-Copyright (c) 2018-2019 Ferdinand Prantl
+Copyright (c) 2018-2022 Ferdinand Prantl
 
 Licensed under the MIT license.
 
 [Node.js]: http://nodejs.org/
 [NPM]: https://www.npmjs.com/
-[RequireJS]: https://requirejs.org/
+[PNPM]: https://pnpm.io/
+[Yarn]: https://yarnpkg.com/
 [Day.js]: https://github.com/iamkun/dayjs
 [date-fns]: https://github.com/date-fns/date-fns
 [timeZone plugin]: https://github.com/prantlf/dayjs/blob/combined/docs/en/Plugin.md#timezone
 [date-fns-timezone]: https://github.com/prantlf/date-fns-timezone
 [migration guide]: docs/migration.md#migration-from-1x-to-2x
 [complete sample applications]: examples#readme
+[module loading]: ./docs/API.md#loading
+[Usage scenarios]: ./docs/usage.md#usage-scenarios
+[Design concepts]: ./docs/design.md#design-concepts
+[Generating custom time zone data]: ./docs/usage.md#generate-custom-time-zone-data
+[API reference]: ./docs/API.md#api-reference