Update to Deno 1.4.4, std 0.73.0, media_types 2.5.1 (oakserver#247)

Update to Deno 1.4.2, std 0.71.0, media_types 2.5.0

Specify `import type` when applicable (oakserver#244)

This fixes TS1371 that raises in deno 1.4.0 with the --unstable flag

Deno typescript check is getting stricter by default:
https://deno.land/manual/getting_started/typescript

Co-authored-by: Guillaume Esquevin <[email protected]>

Update to Deno 1.3.2, std 0.67.0, media-types 2.4.6

Update to std 0.65.0, media_types 2.4.5

Also change CI to test with isolated modules.

Handle UTF-8 Content-Disposition headers properly.

Fixes oakserver#211

Headers aren't supposed to be encoded as UTF-8, but it appears it is
common practice to do so when setting the filename in the
Content-Disposition header in a multipart form.  Therefore instead of
using the DOM Header we have to use an object record.

breaking: refactor ctx.request.body() (oakserver#201)

Fixes oakserver#191

Update formatting

Update to Deno 1.1.1, std 0.58.0, media_types 2.3.7

Application supports .handle() method.

Also refactoring of various types to oak less coupled to
`std/http/server` and allow easier integration with other types of
servers.