feat: init systemjs-unpkg

Author: privatenumber

.editorconfig

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+root = true
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.gitattributes

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+* text=auto eol=lf

.github/workflows/release.yml

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+name: Release
+on:
+  push:
+    branches: [ master, next, next-major, beta, alpha ]
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+      - name: Install dependencies
+        run: npm ci
+      - name: Lint
+        run: npm run lint
+      - name: Test
+        run: npm run test --if-present
+      - name: Build
+        run: npm run build --if-present
+      - name: Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npx semantic-release

.github/workflows/test.yml

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+name: Test
+on:
+  push:
+    branches: [ develop ]
+  pull_request:
+    branches: [ develop, master, next, next-major, beta, alpha ]
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    strategy:
+      matrix:
+        node-version: [ 10.x, 14.x ]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: npm ci
+      - name: Lint
+        run: npm run lint
+      - name: Test
+        run: npm run test --if-present

.gitignore

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+# macOS
+.DS_Store
+
+# Logs
+logs
+*.log
+
+# Node dependency directory
+node_modules
+
+# Output of 'npm pack'
+*.tgz
+
+# dotenv environment variables file
+.env
+.env.test
+
+# Bundle output
+dist

.nvmrc

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+v12.18.4

LICENSE

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+MIT License
+
+Copyright (c) Hiroki Osame <hiroki.osame@gmail.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.

README.md

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+# systemjs-unpkg [![Latest version](https://badgen.net/npm/v/systemjs-unpkg)](https://npm.im/systemjs-unpkg) [![Monthly downloads](https://badgen.net/npm/dm/systemjs-unpkg)](https://npm.im/systemjs-unpkg) [![Install size](https://packagephobia.now.sh/badge?p=systemjs-unpkg)](https://packagephobia.now.sh/result?p=systemjs-unpkg) [![Bundle size](https://badgen.net/bundlephobia/minzip/systemjs-unpkg)](https://bundlephobia.com/result?p=systemjs-unpkg)
+
+Auto-resolve bare specifiers in [SystemJS](https://github.com/systemjs/systemjs) using [UNPKG](https://unpkg.com)
+
+**Before**
+
+```html
+<script type="systemjs-importmap">
+{
+  "imports": {
+    "lodash/": "//unpkg.com/lodash/",
+    ...
+  }
+}
+</script>
+```
+
+```js
+const _ = await System.import('lodash'); // ⬅ Won't work unless the import map above is defined
+```
+
+**After**
+
+```js
+const _ = await System.import('lodash'); // ⬅ Automatically resolved without import map
+```
+
+## 🙋‍♂️ Why?
+- **⚡️ Simplify SystemJS setup** Zero config setup to seemlessly resolve arbitrary bare specifiers!
+- **🔥 Import map fallback** Only resolves specifiers that aren't defined in your [import map](https://github.com/systemjs/systemjs/blob/master/docs/import-maps.md)!
+- **🐥 Tiny** Only `255B`!
+
+## 🚀 Install
+```sh
+npm i systemjs-unpkg
+```
+
+## 🚦 Quick Setup
+Simply load `systemjs-unpkg` after you load SystemJS.
+
+If you're using a JS bundler:
+
+```js
+// Load systemjs
+import 'systemjs';
+
+// Load the systemjs AMD extra, as most npm packages have UMD/AMD distributions
+import 'systemjs/dist/extras/amd';
+
+// Load systemjs-unpkg
+import 'systemjs-unpkg';
+```
+
+If in a browser:
+
+```html
+<!-- Load systemjs -->
+<script src="//unpkg.com/systemjs/dist/system.min.js"></script>
+
+<!-- Load the systemjs AMD extra, as most npm packages have UMD/AMD distributions -->
+<script src="//unpkg.com/systemjs/dist/extras/amd.min.js"></script>
+
+<!-- Load systemjs-unpkg -->
+<script src="//unpkg.com/systemjs-unpkg"></script>
+```
+