readmeio
diff --git a/.eslintrc b/.eslintrc
@@ -1,28 +1,21 @@
 {
-  "extends": [
-    "@readme/eslint-config",
-    "@readme/eslint-config/typescript"
-  ],
+  "extends": ["@readme/eslint-config", "@readme/eslint-config/typescript", "@readme/eslint-config/esm"],
   "root": true,
   "env": {
     "es2020": true
   },
   "rules": {
+    "@typescript-eslint/no-explicit-any": "off",
     "global-require": "off",
     "no-case-declarations": "off"
   },
-  "settings": {
-    "polyfills": [
-      "fetch",
-      "Headers",
-      "Request"
-    ]
-  },
   "overrides": [
     {
-      "files": ["example.js"],
+      "files": ["example.{c,m}js"],
       "rules": {
         "@typescript-eslint/no-var-requires": "off",
+        "import/extensions": "off",
+        "import/no-commonjs": "off",
         "import/no-extraneous-dependencies": "off",
         "no-console": "off"
       }

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
@@ -1,7 +1,7 @@
 version: 2
 updates:
   - package-ecosystem: github-actions
-    directory: "/"
+    directory: '/'
     schedule:
       interval: monthly
     reviewers:
@@ -13,27 +13,25 @@ updates:
       prefix-development: chore(deps-dev)
 
   - package-ecosystem: npm
-    directory: "/"
+    directory: '/'
     schedule:
       interval: monthly
     open-pull-requests-limit: 10
     reviewers:
       - erunion
     labels:
       - dependencies
+    groups:
+      minor-development-deps:
+        dependency-type: 'development'
+        update-types:
+          - minor
+          - patch
     commit-message:
       prefix: chore(deps)
       prefix-development: chore(deps-dev)
     ignore:
-      # These can't be upgraded because `@jsdevtools/karma-config@3` still requires Webpack 4.
-      - dependency-name: ts-loader
-        versions:
-          - "> 8"
-      - dependency-name: webpack
-        versions:
-          - "> 4"
-
       # node-fetch is now an ESM package and can't be used here without a rewrite.
-      - dependency-name: node-fetch
+      - dependency-name: temp-dir
         versions:
-          - ">= 3"
+          - '>= 3'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -7,26 +7,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
-
-      - name: Get npm cache directory
-        id: npm-cache-dir
-        run: |
-          echo "::set-output name=dir::$(npm config get cache)"
-
-      - uses: actions/cache@v3.0.5
-        id: npm-cache
-        with:
-          path: ${{ steps.npm-cache-dir.outputs.dir }}
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-node-
+          node-version: lts/-1
+          cache: 'npm'
 
       - run: npm ci
-      - run: npm run build
       - run: npm run lint
 
   node_tests:
@@ -40,93 +27,66 @@ jobs:
           - ubuntu-latest
           - windows-latest
         node:
-          - 14
-          - 16
-          - 18
+          - lts/-1
+          - lts/*
+          - latest
 
     steps:
       - name: Checkout source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Node ${{ matrix.node }}
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
-
-      - name: Get npm cache directory
-        id: npm-cache-dir
-        run: |
-          echo "::set-output name=dir::$(npm config get cache)"
-
-      - uses: actions/cache@v3.0.5
-        id: npm-cache
-        with:
-          path: ${{ steps.npm-cache-dir.outputs.dir }}
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-node-
-
-      # Node 14 still ships with npm@6 which doesn't install peerDeps by default.
-      - name: Install npm@7
-        if: matrix.node == '14'
-        run: npm install -g npm@7
-
-      - run: npm ci
-      - run: npm run build
-      - run: npm run test --ignore-scripts
-
-  browser_tests:
-    name: Browser
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: true
-      matrix:
-        browser:
-          - chrome
-          - firefox
-        os:
-          - ubuntu-latest
-          - windows-latest
-
-    steps:
-      - name: Checkout source
-        uses: actions/checkout@v3
-
-      - name: Install Node
-        uses: actions/setup-node@v3
-        with:
-          node-version: 16
-
-      - name: Get npm cache directory
-        id: npm-cache-dir
-        run: |
-          echo "::set-output name=dir::$(npm config get cache)"
-
-      - uses: actions/cache@v3.0.5
-        id: npm-cache
-        with:
-          path: ${{ steps.npm-cache-dir.outputs.dir }}
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-node-
-
-      - run: npm ci
-      - run: npm run build
-
-      # Chrome
-      - uses: browser-actions/setup-chrome@latest
-        if: matrix.browser == 'chrome'
-
-      - name: Run tests on Chrome
-        if: matrix.browser == 'chrome'
-        run: |
-          npm run test:browser -- --browsers=ChromeHeadless
-
-      # Firefox
-      - uses: browser-actions/setup-chrome@latest
-        if: matrix.browser == 'firefox'
-
-      - name: Run tests on Firefox
-        if: matrix.browser == 'firefox'
-        run: |
-          npm run test:browser -- --browsers=FirefoxHeadless
+          cache: 'npm'
+
+      - run: npm cit
+
+  ###
+  ### Temporarily skipping these until browser testing in Vitest is a bit more stable.
+  ###
+  # browser_tests:
+  #   name: Browser
+  #   runs-on: ${{ matrix.os }}
+  #   timeout-minutes: 5
+  #   strategy:
+  #     fail-fast: true
+  #     matrix:
+  #       browser:
+  #         - chrome
+  #         - firefox
+  #       os:
+  #         - ubuntu-latest
+  #         - windows-latest
+
+  #   steps:
+  #     - name: Checkout source
+  #       uses: actions/checkout@v4
+
+  #     - name: Install Node
+  #       uses: actions/setup-node@v4
+  #       with:
+  #         node-version: 18
+  #         cache: 'npm'
+
+  #     - run: npm ci
+  #     - run: npm run build
+
+  #     # Chrome
+  #     - uses: browser-actions/setup-chrome@latest
+  #       if: matrix.browser == 'chrome'
+
+  #     - name: Run tests on Chrome
+  #       if: matrix.browser == 'chrome'
+  #       run: |
+  #         npm run test:browser -- --browsers=ChromeHeadless
+
+  #     # Firefox
+  #     - uses: browser-actions/setup-chrome@latest
+  #       if: matrix.browser == 'firefox'
+
+  #     - name: Run tests on Firefox
+  #       if: matrix.browser == 'firefox'
+  #       run: |
+  #         npm run test:browser -- --browsers=FirefoxHeadless
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
@@ -1,4 +1,4 @@
-name: "CodeQL"
+name: 'CodeQL'
 
 on:
   push:
@@ -20,16 +20,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'javascript' ]
+        language: ['javascript']
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
 
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
diff --git a/.mocharc.json b/.mocharc.json
diff --git a/.npmignore b/.npmignore
diff --git a/.npmrc b/.npmrc
@@ -0,0 +1 @@
+lockfile-version=3