fix: axios common headers set

[mathieu-gilloots]

Hello,
Upgrading from axios 0.27.2 to 1.1.2 makes requests failed.
Without this PR, vue-auth will add a "common" header to the request as an object.

With this PR, we correctly set the header, always by merging the existing ones.

Need a release for correcting vue-auth with axios 1.x

Note: I just changed a src/drivers/http/axios.js but the npm run build make some indentation update.

[websanova]

This would break backwards compatibility though, no?

Really this should be as a 0.x and 1.x driver with the change, but since the current file is already named 1.x that will mess up anyone who updates.

Not sure if we can just put a if (request.headers.common) check there, I'll need to test this a bit.

[mathieu-gilloots]

Hello,
It's what I think, but after read the axios 0.x and 1.x it's seams the common attributes it's only applicable to (instance|axios).defaults.headers not on the request.
I don't know why it's works on the axios 0.x on the request.headers

Axios 0.x doc : https://github.com/axios/axios/tree/v0.x#global-axios-defaults
Axios 1.x doc : https://github.com/axios/axios/tree/v1.x#global-axios-defaults

We could put and if (request.headers.common) but in the 0.x with setHeaders, it's simply add headers specified in common along the existing headers. (there is no common header on the request at execution).

[websanova]

Ok, I just tested this in axios 0.21.1 and 1.1.3, seems to work fine in both so went ahead and merged this in, available at version 4.2.0.

Just a note, next time no need to run/push the build, those need to be versioned anyway, so I just do that on my end.