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Latest release

v1.21.0 — October 21, 2026

This release adds response timing and opt-in UTF-8 Basic authentication, improves request handling across runtimes, and changes how header defaults are recognized.

 ⚠️ Breaking Changes & Deprecations

 Header Defaults: Only plain objects, null-prototype maps, and compatible AxiosHeaders instances are treated as common or method-specific defaults; literal headers such as Link are now preserved. Applications using custom class instances as defaults must convert them to plain maps, for example { post: { ...customDefaults } }, or compatible AxiosHeaders. Otherwis