v2.1.5

• #77 Move _retries counting to the reconnect method, implement test for bug (@fabdrol)
• #89 Implement backwards-compatible discovery API that uses mDNS (@fabdrol)
• #91 Update mocha to the latest version 🚀 (@Greenkeeper[bot])
• #88 Implement back-off policy, more relevant maxRetries default (@fabdrol)
• #97 chore: add release script (@sbender9)
• #96 fix: failing because of missing core-js runtime dependency (@sbender9)

This version in npm