Promise upgrade (#158)

* docs: do not explicitly set content type when using formdata

* ci: fix security flaw in ci

* tidy: refactor tick function to reduce cyclomatic complexity

* build: upgrade deps to 8.3+

* build: bump GT deps to latest releases

Async methods (#155)

* feature: awaitFetch
closes #153

* tweak: param typehint

* feature: await methods, closes #153

* build: php 8.1 compatibility

FormData posts and uploads (#151)

* feature: post data with formdata
closes #99

* feature: use phpgt/http Response for FormData posts and uploads
closes #150

* tweak: import CURLFile

Replace Async functionality (#100)

* wip: phpgt/promise implementation
for #89

* wip: refactor to gt promise model
still need to handle rejection exceptions

* feature: add badly formed json for testing

* ci: update workflows

* build: update dependencies

* docs: update example to match new functionality

* wip: sign off Http class

* wip: use master branch of async

* wip: fix existing tests

* feature: implement proper blob response type

* wip: tidy request resolver

* wip: tidy curl opt builder

* wip: tidy http class

* stan: improve static analysis over core classes

* test: improve types for native curl handle

* stan: remove unused import

* wip: document BodyResponse internal rejection

* wip: remove alternative method of throwing internal exception

* docs: update examples

Upgrade CI (#87)

* Upgrade CI

* Fix static analysis on stubs

Remove development dependencies

Update json response

Merge pull request #35 from PhpGt/dependabot/composer/phpunit/phpunit…

…-8.0.5

Bump phpunit/phpunit from 8.0.4 to 8.0.5

Add post request example

Add stub to convert fetch init to curlopt