Build with SvelteKit packager

* Components are now written in TypeScript, avoiding the need to maintain and test separate type definitions.
* Migrated docs site to use SvelteKit and Bootstrap 5.
* Switched from Prism to Highlight.js for code syntax highlighting.
* Enabled Prettier to autoformat code.
* Switched from Jest to Vitest for tests.
* Separate `gh-pages` branch is now used to deploy docs so autogenerated files don't have to be committed to master branch.
* Added contributing instructions file.

These changes should make it a lot easier to build and test the project, lowering the barrier for contributions and future maintenance.

Closes #313, closes #311

.editorconfig

@@ -7,46 +7,10 @@ root = true
 [*]
 end_of_line = lf
 charset = utf-8
+indent_style = space
+indent_size = 2
 trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.md]
 trim_trailing_whitespace = false
-indent_style = space
-indent_size = 2
-
-[*.js]
-indent_style = space
-indent_size = 2
-
-[*.coffee]
-indent_style = space
-indent_size = 2
-
-[*.html]
-indent_style = space
-indent_size = 2
-
-[*.ejs]
-indent_style = space
-indent_size = 2
-
-[*.css]
-indent_style = space
-indent_size = 2
-
-[*.less]
-indent_style = space
-indent_size = 2
-
-[*.styl]
-indent_style = space
-indent_size = 2
-
-[*.vue]
-indent_style = space
-indent_size = 2
-
-[*.eslintrc]
-indent_style = space
-indent_size = 2

.eslintrc.cjs

@@ -0,0 +1,31 @@
+/** @type { import("eslint").Linter.Config } */
+module.exports = {
+  root: true,
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:svelte/recommended",
+    "prettier",
+  ],
+  parser: "@typescript-eslint/parser",
+  plugins: ["@typescript-eslint"],
+  parserOptions: {
+    sourceType: "module",
+    ecmaVersion: 2020,
+    extraFileExtensions: [".svelte"],
+  },
+  env: {
+    browser: true,
+    es2017: true,
+    node: true,
+  },
+  overrides: [
+    {
+      files: ["*.svelte"],
+      parser: "svelte-eslint-parser",
+      parserOptions: {
+        parser: "@typescript-eslint/parser",
+      },
+    },
+  ],
+};

.github/dependabot.yml

@@ -1,20 +1,10 @@
 version: 2
 updates:
-- package-ecosystem: npm
-  directory: "/"
-  schedule:
-    interval: weekly
-    time: "21:00"
-  open-pull-requests-limit: 10
-  reviewers:
-  - Cweili
-  ignore:
-  - dependency-name: eslint
-    versions:
-    - 7.18.0
-    - 7.19.0
-    - 7.20.0
-    - 7.21.0
-    - 7.22.0
-    - 7.23.0
-    - 7.24.0
+  - package-ecosystem: npm
+    directory: "/"
+    schedule:
+      interval: weekly
+      time: "21:00"
+    open-pull-requests-limit: 10
+    reviewers:
+      - Cweili

.github/workflows/ci.yml

@@ -1,11 +1,11 @@
-name: 'ci'
+name: "ci"
 on:
   push:
     branches-ignore:
-      - 'dependabot/**'
+      - "dependabot/**"
   pull_request:
     branches:
-      - '**'
+      - "**"
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -14,11 +14,13 @@ jobs:
 
       - uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 20
 
       - run: npm install
+      - run: npm run check
+      - run: npm run lint
       - run: npm run build
-      - run: npm test -- --coverageReporters=lcov
+      - run: npm test -- --coverage
 
       - uses: coverallsapp/github-action@master
         with:

.gitignore

@@ -1,40 +1,17 @@
-# Temporary
-.tmp
-*.tmp
-
-# Logs
-logs
-*.log*
-
-# Runtime data
-pids
-*.pid
-*.seed
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
 # Coverage directory used by tools like istanbul
 coverage
 
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# Compiled binary addons (http://nodejs.org/api/addons.html)
-build/Release
-
 # Dependency directory
-# Commenting this out is preferred by some people, see
-# https://npmjs.org/doc/faq.html#Should-I-check-my-node_modules-folder-into-git
 node_modules
-bower_components
-
-# Users Environment Variables
-.lock-wscript
 package-lock.json
 
 # IDE configs
 .idea
 
 # Distributions
+/build
 /dist
+/.svelte-kit
+/package
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*

.prettierignore

@@ -0,0 +1,6 @@
+node_modules
+/build
+/.svelte-kit
+/package
+package-lock.json
+*.md