fetch() extension

Extension of native fetch with:

* Retryable requests
* Request timeout
* Standalone HTTP utilities

!ci status

options.extension

* timeout number | string

Request timeout

* retry Object
- limit number

Default: 1
- methods string[] | false

Default: [DELETE, GET, HEAD, PATCH, PUT]
- delay number | string | resolver

Default: 100

* json any

Shortcut for sending JSON serialized data. Equivalent to:
``
{
headers: {
'content-type': 'application/json',
'accept': 'application/json',
},
body: JSON.stringify(value),
}
`

response.extension

* body()

Infer and execute body parser based on content-type`