Typescript conversion (#1828)

* initial typescript conversion

* test: update overflow+transform ref test

* fix: correctly render pseudo element content

* fix: testrunner build

* fix: karma test urls

* test: update underline tests with <u> elements

* test: update to es6-promise polyfill

* test: remove watch from server

* test: remove flow

* format: update prettier for typescript

* test: update eslint to use typescript parser

* test: update linear gradient reftest

* test: update test runner

* test: update testrunner promise polyfill

* fix: handle display: -webkit-flex correctly (fix #1817)

* fix: correctly render gradients with clip & repeat (fix #1773)

* fix: webkit-gradient function support

* fix: implement radial gradients

* fix: text-decoration rendering

* fix: missing scroll positions for elements

* ci: fix ios 11 tests

* fix: ie logging

* ci: improve device availability logging

* fix: lint errors

* ci: update to ios 12

* fix: check for console availability

* ci: fix build dependency

* test: update text reftests

* fix: window reference for unit tests

* feat: add hsl/hsla color support

* fix: render options

* fix: CSSKeyframesRule cssText Permission Denied on Internet Explorer 11 (#1830)

* fix: option lint

* fix: list type rendering

* test: fix platform import

* fix: ie css parsing for numbers

* ci: add minified build

* fix: form element rendering

* fix: iframe rendering

* fix: re-introduce experimental foreignobject renderer

* fix: text-shadow rendering

* feat: improve logging

* fix: unit test logging

* fix: cleanup resources

* test: update overflow scrolling to work with ie

* build: update build to include typings

* fix: do not parse select element children

* test: fix onclone test to work with older IEs

* test: reduce reftest canvas sizes

* test: remove dynamic setUp from list tests

* test: update linear-gradient tests

* build: remove old source files

* build: update docs dependencies

* build: fix typescript definition path

* ci: include test.js on docs website

rollup.config.ts

@@ -0,0 +1,42 @@
+import resolve from 'rollup-plugin-node-resolve';
+import commonjs from 'rollup-plugin-commonjs';
+import sourceMaps from 'rollup-plugin-sourcemaps';
+import typescript from 'rollup-plugin-typescript2';
+import json from 'rollup-plugin-json';
+
+const pkg = require('./package.json');
+
+const banner = `/*!
+ * ${pkg.title} ${pkg.version} <${pkg.homepage}>
+ * Copyright (c) ${(new Date()).getFullYear()} ${pkg.author.name} <${pkg.author.url}>
+ * Released under ${pkg.license} License
+ */`;
+
+export default {
+    input: `src/index.ts`,
+    output: [
+        { file: pkg.main, name: pkg.name, format: 'umd', banner, sourcemap: true },
+        { file: pkg.module, format: 'esm', banner, sourcemap: true },
+    ],
+    external: [],
+    watch: {
+        include: 'src/**',
+    },
+    plugins: [
+        // Allow node_modules resolution, so you can use 'external' to control
+        // which external modules to include in the bundle
+        // https://github.com/rollup/rollup-plugin-node-resolve#usage
+        resolve(),
+        // Allow json resolution
+        json(),
+        // Compile TypeScript files
+        typescript({ useTsconfigDeclarationDir: true }),
+        // Allow bundling cjs modules (unlike webpack, rollup doesn't understand cjs)
+        commonjs({
+            include: 'node_modules/**'
+        }),
+
+        // Resolve source maps to the original source
+        sourceMaps(),
+    ],
+}