v2.0.0

Changes

🚀 Features

• feat: modernize ncaptcha to v2 with secure captcha pipeline @niteshpurohit (#102)

Added

• Modern TypeScript + ESM package structure targeting Node.js 20+.
• New functional API: createChallenge(options?) and verifyChallenge(input).
• Stateless signed captcha verification with HMAC-SHA256.
• Replay hook support in verification and explicit replayed reason.
• Stronger captcha rendering with layered distortion/noise controls.
• Runtime input validation for distortion/noise and secure token parsing.
• Native node:test test suite with strict coverage thresholds.
• ESLint setup with strict lint gate in CI.
• GitHub workflows for CI, Release Drafter, and Trusted Publishing release flow.

Changed

• Breaking API migration from legacy class API (generate/check) to function-based API.
• Captcha output now returns PNG Buffer + mime type instead of only data URL flow.
• Project tooling moved from legacy Mocha/nyc/Travis stack to modern TypeScript + GitHub Actions.

Security

• Constant-time signature/hash comparisons for verification checks.
• Base64url encoding/decoding path hardened to avoid regex-based ReDoS findings.

Removed

• Legacy v1 implementation and test stack.
• Legacy CI (.travis.yml) and yarn lockfile.