In version 0.19, I couldn't add config parameters

[tangzui]

Describe the bug
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To Reproduce
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// Example code here

Expected behavior
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Environment:

• Axios Version [e.g. 0.18.0]
• OS: [e.g. iOS 12.1.0, OSX 10.13.4]
• Browser [e.g. Chrome, Safari]
• Browser Version [e.g. 22]
• Additional Library Versions [e.g. React 16.7, React Native 0.58.0]

Additional context/Screenshots
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[ApsarasX]

I also encountered this problem.

[iwaszko]

There is no description in this issue but judging by the title alone, it's a duplicate of #1718 and #2203 and probably few other.