refactor!: convert to Polymer 3

vaadin/vaadin-lumo-styles#104

Author: web-padawan

packages/vaadin-lumo-styles/.bowerrc

@@ -1,18 +1,15 @@
 {
-  "extends": "vaadin",
+  "extends": [
+    "eslint:recommended",
+    "plugin:prettier/recommended"
+  ],
+  "plugins": ["prettier"],
   "env": {
     "browser": true,
-    "node": true,
     "es6": true
   },
   "parserOptions": {
-    "ecmaVersion": 8
-  },
-  "plugins": [
-    "html"
-  ],
-  "globals": {
-    "Polymer": false,
-    "Vaadin": false
+    "sourceType": "module",
+    "ecmaVersion": 2020
   }
 }

packages/vaadin-lumo-styles/.eslintrc.json

@@ -0,0 +1,22 @@
+name: tests
+
+on: [pull_request]
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v1
+      with:
+        node-version: 12
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Lint JavaScript
+      run: npm run lint:js
+
+    - name: Lint CSS
+      run: npm run lint:css

packages/vaadin-lumo-styles/.github/workflows/lint.yml

@@ -0,0 +1 @@
+package-lock=false

packages/vaadin-lumo-styles/.npmrc

@@ -0,0 +1,6 @@
+{
+  "singleQuote": true,
+  "printWidth": 120,
+  "trailingComma": "none",
+  "htmlWhitespaceSensitivity": "strict"
+}

packages/vaadin-lumo-styles/.prettierrc

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright (c) 2021 Vaadin Ltd.
+ * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
+ */
+import './mixins/field-button.js';
+export * from './mixins/field-button.js';
+import './mixins/menu-overlay.js';
+export * from './mixins/menu-overlay.js';
+import './mixins/overlay.js';
+export * from './mixins/overlay.js';
+import './mixins/required-field.js';
+export * from './mixins/required-field.js';
+import './badge.js';
+export * from './badge.js';
+import './color.js';
+export * from './color.js';
+import './font-icons.js';
+export * from './font-icons.js';
+import './icons.js';
+export * from './icons.js';
+import './sizing.js';
+export * from './sizing.js';
+import './spacing.js';
+export * from './spacing.js';
+import './style.js';
+export * from './style.js';
+import './typography.js';
+export * from './typography.js';

packages/vaadin-lumo-styles/.travis.yml

@@ -1,3 +1,3 @@
-import {CSSResult} from 'lit-element';
+import { CSSResult } from 'lit-element';
 
 export const badge: CSSResult;