Fixes and Functionality:

- Updating axios requests to be delayed by pre-emptive promise creation (#2702)

- Adding "synchronous" and "runWhen" options to interceptors api (#2702)

- Updating of transformResponse (#3377)

- Adding ability to omit User-Agent header (#3703)

- Adding multiple JSON improvements (#3688, #3763)

- Fixing quadratic runtime and extra memory usage when setting a maxContentLength (#3738)

- Adding parseInt to config.timeout (#3781)

- Adding custom return type support to interceptor (#3783)

- Adding security fix for ReDoS vulnerability (#3980)

Internal and Tests:

- Updating build dev dependancies (#3401)

- Fixing builds running on Travis CI (#3538)

- Updating follow rediect version (#3694, #3771)

- Updating karma sauce launcher to fix failing sauce tests (#3712, #3717)

- Updating content-type header for application/json to not contain charset field, according do RFC 8259 (#2154)

- Fixing tests by bumping karma-sauce-launcher version (#3813)

- Changing testing process from Travis CI to GitHub Actions (#3938)

Documentation:

- Updating documentation around the use of `AUTH_TOKEN` with multiple domain endpoints (#3539)

- Remove duplication of item in changelog (#3523)

- Fixing gramatical errors (#2642)

- Fixing spelling error (#3567)

- Moving gitpod metion (#2637)

- Adding new axios documentation website link (#3681, #3707)

- Updating documentation around dispatching requests (#3772)

- Adding documentation for the type guard isAxiosError (#3767)

- Adding explanation of cancel token (#3803)

- Updating CI status badge (#3953)

- Fixing errors with JSON documentation (#3936)

- Fixing README typo under Request Config (#3825)

- Adding axios-multi-api to the ecosystem file (#3817)

- Adding SECURITY.md to properly disclose security vulnerabilities (#3981)

"version": "0.21.2",

"homepage": "https://axios-http.com",