Improved testing, documentation and some minor hygiene factors

.github/FUNDING.yml

@@ -0,0 +1,5 @@
+# These are supported funding model platforms
+
+github: [sindresorhus]
+tidelift: npm/pretty-bytes
+custom: https://sindresorhus.com/donate

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug Report
+about: Create a report to help improve the project
+title: "[BUG] "
+labels: bug
+assignees: ''
+---
+
+## Description
+<!-- A clear and concise description of what the bug is -->
+
+## Reproduction Steps
+<!-- Steps to reproduce the behavior -->
+
+## Expected Behavior
+<!-- A clear and concise description of what you expected to happen -->
+
+## Environment
+- Node.js version:
+- pretty-bytes version:
+- OS:
+
+## Additional Context
+<!-- Add any other context about the problem here -->

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,17 @@
+<!-- Thank you for contributing to pretty-bytes! -->
+
+## Description
+<!-- Briefly describe what this PR does -->
+
+## Type of Change
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Documentation
+- [ ] Refactoring
+- [ ] Other (please describe):
+
+## Checklist
+- [ ] I have read the CONTRIBUTING.md file
+- [ ] My code follows the code style of this project
+- [ ] I have added tests that prove my fix is effective or my feature works
+- [ ] New and existing tests pass locally with my changes

.github/dependabot.yml

@@ -0,0 +1,20 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    versioning-strategy: increase
+    groups:
+      dev-dependencies:
+        dependency-type: "development"
+        update-types:
+          - "minor"
+          - "patch"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    open-pull-requests-limit: 10

.github/workflows/main.yml

@@ -1,7 +1,13 @@
 name: CI
 on:
-  - push
-  - pull_request
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Node.js ${{ matrix.node-version }}
@@ -17,5 +23,23 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm install
-      - run: npm test
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci
+      - name: Run tests
+        run: npm test
+
+  coverage:
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.event_name != 'pull_request'
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci
+      - name: Run coverage
+        run: npm run coverage

.gitignore

@@ -1,2 +1,3 @@
 node_modules
-yarn.lock
+coverage
+package-lock.json

.npmrc

@@ -1 +1,3 @@
-package-lock=false
+registry=https://registry.npmjs.org/
+package-lock=true
+save-exact=true

CONTRIBUTING.md

@@ -0,0 +1,38 @@
+# Contributing
+
+Thank you for considering contributing to pretty-bytes!
+
+## Development
+
+1. Fork this repository and clone it to your local machine
+2. Install dependencies with `npm install`
+3. Make your changes
+4. Run tests with `npm test`
+5. Submit a pull request
+
+## Pull Request Guidelines
+
+- Follow the existing code style and formatting (using XO)
+- Add or update tests for your changes
+- Ensure all tests pass locally before submitting
+- Keep your PR focused on a single topic
+- Update documentation if necessary
+
+## Testing
+
+We use AVA for testing. Run the test suite with:
+
+```sh
+npm test
+```
+
+This will run the linter (XO), tests (AVA) and TypeScript definition tests (TSD).
+
+## Release Process
+
+The package release is handled by the maintainers using:
+
+1. Update version in package.json
+2. Create a Git tag
+3. Push to GitHub
+4. Publish to npm

index.test-d.ts

@@ -1,10 +1,47 @@
 import {expectType} from 'tsd';
 import prettyBytes from './index.js';
 
+// Basic type tests
 expectType<string>(prettyBytes(1337));
 expectType<string>(prettyBytes(42, {signed: true}));
 expectType<string>(prettyBytes(1337, {locale: 'de'}));
 expectType<string>(prettyBytes(1337, {locale: true}));
 expectType<string>(prettyBytes(1337, {bits: true}));
 expectType<string>(prettyBytes(1337, {binary: true}));
 expectType<string>(prettyBytes(1337, {space: true}));
+
+// Advanced type tests
+expectType<string>(prettyBytes(BigInt(9_007_199_254_740_991))); // Max safe integer as BigInt
+expectType<string>(prettyBytes(-1337));
+expectType<string>(prettyBytes(0));
+
+// Options combinations
+expectType<string>(prettyBytes(1337, {
+	bits: true,
+	binary: true,
+	signed: true,
+	space: false,
+}));
+
+// Locale options
+expectType<string>(prettyBytes(1337, {locale: ['fr', 'en']}));
+
+// Precision options
+expectType<string>(prettyBytes(1337, {
+	minimumFractionDigits: 2,
+	maximumFractionDigits: 4,
+}));
+
+// All options combined
+expectType<string>(prettyBytes(1337, {
+	bits: true,
+	binary: true,
+	signed: true,
+	space: false,
+	locale: 'de',
+	minimumFractionDigits: 1,
+	maximumFractionDigits: 3,
+}));
+
+// Note: Runtime error checks are performed in test.js
+// Type safety is enforced by TypeScript compiler