Update dependency node-email-verifier to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
node-email-verifier	2.0.0 -> 4.0.0

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Release Notes

jesselpalmer/node-email-verifier (node-email-verifier)

v4.0.0

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BREAKING CHANGES

• Minimum Node.js version is now 20.0.0 (previously 18.0.0)
  • Node.js 18 reached End of Life on April 30, 2025
  • Updated CI workflows to test on Node 20.x, 22.x, and 24.x only
  • Enables modern tooling and dependencies that require Node 20+

Changed

• Updated all dev dependencies to latest versions:

  • @typescript-eslint/eslint-plugin: 8.34.0 → 8.47.0
  • @typescript-eslint/parser: 8.34.0 → 8.47.0
  • eslint: 9.29.0 → 9.39.1
  • eslint-config-prettier: 10.1.5 → 10.1.8
  • eslint-plugin-prettier: 5.4.1 → 5.5.4
  • jest: 30.0.2 → 30.2.0
  • lint-staged: 16.1.2 → 16.2.7
  • markdownlint: 0.38.0 → 0.39.0
  • markdownlint-cli2: 0.18.1 → 0.19.1
  • prettier: 3.5.3 → 3.6.2
  • ts-jest: 29.4.0 → 29.4.5
  • typescript: 5.2.2 → 5.9.3
  • typescript-eslint: 8.34.0 → 8.47.0
  • @types/node: 24.0.3 → 24.10.1

• Updated GitHub Actions:

  • actions/checkout: v4 → v5
  • actions/setup-node: v4 → v6
  • github/codeql-action: v3 → v4
  • actions/github-script: v7 → v8

Security

• Updated validator to address CVE-2025-56200 (13.15.15 → 13.15.20)
• Updated js-yaml to address prototype pollution vulnerability (4.1.0 → 4.1.1)

Documentation

• Enhanced ValidKit promotional section with updated metrics (4,500+ disposable domains)
• Updated README to reflect Node.js 20.0.0 minimum requirement
• Improved API key onboarding flow with clearer instructions

v3.4.1

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Fixed

• Fixed missing dist files in npm package by adding .npmignore file (#​65)
  • dist/index.js and dist/index.d.ts were excluded from npm package due to .gitignore
  • Added .npmignore to ensure dist files are included while keeping them out of git

Added

• Added sponsorship information to README with links to support the project
• Added sponsor badge to encourage community support
• Enhanced prepublishOnly hook to run comprehensive validation before npm publish
• Added package size enforcement (1MB limit) to local validation
• Enhanced pre-push git hook to validate packages on main/release branches
• Updated release documentation with automatic safeguards explanation

v3.4.0

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Added

• MX Record Caching with LRU Eviction Strategy (PR #​51):
  • TTL-based caching with configurable default TTL (5 minutes) and max cache size (1000 entries)
  • LRU (Least Recently Used) eviction strategy that keeps frequently accessed domains in memory
  • Cache statistics tracking (hits, misses, evictions, hit rate) included in detailed validation
    results
  • Global cache management with flush, delete, and reset statistics methods
  • 7.7x performance improvement with realistic DNS latency (25ms)
  • 87%+ cache hit rate in typical usage patterns with mixed domain popularity
  • 872 DNS lookups avoided out of 1000 requests (87.2% reduction)
  • Automatic periodic cleanup of expired entries to prevent memory accumulation
  • Comprehensive performance benchmarks demonstrating real-world improvements
• Enhanced TypeScript Support (PR #​57):
  • Export EmailValidationError class and isEmailValidationError helper function for better
    error handling
  • All major interfaces and types now exported: MxRecord, ValidationResult,
    EmailValidatorOptions, CacheStatistics, MxCacheOptions
  • Comprehensive JSDoc documentation on all public APIs

v3.3.0

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Added

• AI Debug Mode (debug: true option) for enhanced debugging and observability:
  • Structured JSON logging with MCP-compatible format
  • Performance timing for each validation phase
  • Memory usage tracking (heap, RSS, external)
  • Detailed error logging with stack traces
  • Debug mode example demonstrating production usage patterns
• Examples directory with comprehensive usage examples:
  • Basic validation patterns (examples/basic-validation.js)
  • TypeScript integration with full type support (examples/typescript-usage.ts)
  • Bulk email validation strategies (examples/bulk-validation.js)
  • Error handling with error codes (examples/error-handling.js)
  • CommonJS compatibility examples (examples/commonjs-usage.cjs)
  • Debug mode usage and production wrapper (examples/debug-mode.js)

v3.2.0

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Added

• Comprehensive error codes system with ErrorCode enum for programmatic error handling
• Custom EmailValidationError class for better error context
• Error codes included in detailed validation results (errorCode field)
• Top-level errorCode in ValidationResult for quick error access
• Automated dependency management with Dependabot configuration
• Auto-merge workflow for Dependabot PRs (patch and minor updates)
• Weekly dependency check workflow that creates GitHub issues
• GitHub CodeQL security scanning for JavaScript/TypeScript
• Security policy (SECURITY.md) with vulnerability reporting guidelines
• AI workflow documentation (docs/AI_WORKFLOW.md) for AI agent interactions
• Better test synchronization with file size checks in waitForFilesToExist
• Performance benchmarks for disposable domain lookups (npm run benchmark)
• Performance documentation (docs/PERFORMANCE.md) with detailed analysis
• Pre-commit hooks with husky and lint-staged for automatic code quality checks
• Pre-push hook to run tests before pushing
• API best practices documentation (docs/API_BEST_PRACTICES.md) with rate limiting guidance
• Git hooks documentation in README
• Moved integration tests to test/integration/ directory for better organization

Changed

• Error messages now use centralized ErrorMessages mapping
• Improved test coverage for error scenarios
• Updated README with comprehensive error handling examples
• Updated CLAUDE.md to mark completed improvements

Fixed

• Path issues in integration tests after directory reorganization
• Race condition in CommonJS import tests by correcting retry parameter order
• Test flakiness by adding proper file content validation

v3.1.3

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Fixed

• Fixed curl command example in README.md by adding missing Content-Type header

v3.1.2

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Changed

• Updated README.md to include information about ValidKit hosted API service

v3.1.1

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Fixed

• Fixed ESM module import issue by adding proper exports field in package.json
  (#​20)
• Added CommonJS compatibility through automatic wrapper generation
• Fixed Windows CI multiline echo commands using heredoc syntax
• Ensured dist directory is properly included in npm packages with files field

Added

• CommonJS wrapper (dist/index.cjs) for require() support
• Comprehensive import tests for both ESM and CommonJS
• Build script with error handling for wrapper generation
• Documentation for dual module system support
• Examples for handling promises in CommonJS
• Markdown linting with markdownlint-cli2 and auto-fix capabilities
• YAML linting with custom validation script using async I/O
• Integration tests for CommonJS, ESM, and TypeScript usage
• npm run check command to run all quality checks
• Comprehensive CONTRIBUTING.md guide for contributors
• lint:all, lint:md, lint:md:fix, and lint:yaml npm scripts

Changed

• Build process now generates CommonJS wrapper automatically
• Enhanced documentation with both ESM and CommonJS usage examples
• CI workflows now use npm ci for faster, more reliable builds
• Improved cross-platform compatibility in GitHub Actions
• Optimized YAML linting with path segment checking

v3.1.0

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Added

• Disposable email detection with 600+ known providers
• Detailed validation results with specific failure reasons
• Performance optimizations for disposable email checking
• 24 new tests for comprehensive coverage

Changed

• All new features are opt-in to maintain backward compatibility
• Enhanced error messaging consistency

v3.0.0

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Changed

• BREAKING: Migrated from CommonJS to ES Modules
• BREAKING: Requires Node.js 18.0.0 or higher
• Converted entire codebase to TypeScript
• Modernized build and test infrastructure

Added

• Full TypeScript support with type definitions
• ES Module syntax throughout
• Modern development tooling

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