Update dependency axios to ^0.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
axios	dependencies	minor	^0.19.0 -> ^0.21.0

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Release Notes

axios/axios

v0.21.0

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Fixes and Functionality:

• Fixing requestHeaders.Authorization (#​3287)
• Fixing node types (#​3237)
• Fixing axios.delete ignores config.data (#​3282)
• Revert "Fixing overwrite Blob/File type as Content-Type in browser. (#​1773)" (#​3289)
• Fixing an issue that type 'null' and 'undefined' is not assignable to validateStatus when typescript strict option is enabled (#​3200)

Internal and Tests:

• Lock travis to not use node v15 (#​3361)

Documentation:

• Fixing simple typo, existant -> existent (#​3252)
• Fixing typos (#​3309)

Huge thanks to everyone who contributed to this release via code (authors listed below) or via reviews and triaging on GitHub:

• Allan Cruz mailto:[email protected]
• George Cheng mailto:[email protected]
• Jay mailto:[email protected]
• Kevin Kirsche mailto:[email protected]
• Remco Haszing mailto:[email protected]
• Taemin Shin mailto:cprayer13@​gmail.com
• Tim Gates mailto:[email protected]
• Xianming Zhong mailto:[email protected]

v0.20.0

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Release of 0.20.0-pre as a full release with no other changes.

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