JavaScript SDK 3.44.3

Fixed

• Disallow accessing HTML rewriter elements outside of handlers (#1541) (bf4ac3d)
• dynamic backends disabled exception (#1535) (432d059)
• Make headers of cloned requests independent (#1539) (9b34c43)
• Memory leak in Backend::health_for_name (#1542) (43e03d2)
• Memory leak in Device::lookup (#1543) (2f02080)
• URLSearchParams premature free (#1538) (da5146c)