[skip ci]

Fixing type definitions so AxiosInstance can be invoked

Fixing interface of axios instance

Update buildURL.js

Update license date

Two if statements is unnecessary, we can replace with "if ... else ..."

Fixing typing issues #1154 #1147

Move window defined check before window.XMLHttpRequest check

Updating typings

security: upgrade follow-redirects

This would prevent tools like nsp to complain about a security issue from axios. It's something that got fixed in the package debug, and in order to benefit from that fix, it's necessary to upgrade to at least follow-redirects@1.2.5

The first argument in `axios.interceptors.response.use` is optional, in the case that you just want to intercept an error.

Ex:

```ts
axios.interceptors.response.use(undefined, error => {
...
});
```

refactor: !isArray(obj) is always true

Allow overriding the used transport

Update AxiosTransformer type in index.d.ts

Add request field to AxiosResponse type definition

Update TypeScript typings with generic type parameters

Adding axios-extensions to the ecosystem

Use XMLHttpRequest in IE10+ instead of XDomainRequest

Add bundlesize to test