Formdata, URLSearchParams (#212)

* wip: add formdata class

* wip: add urlsearchparams class

* feature: implement URLSearchParams

* feature: tweak urlsearchparams

* wip: extract KeyValuePairStore

* wip: implement KeyValuePairStore for FormData

* wip: improve tests by expecting warning to be emitted

* wip: empty formdata options

* wip: test submitter is included in the form submission

* wip: test constructing with square brackets

* wip: fix static analysis error on DOMNodeList

* wip: implement form types

* wip: remove unused constants

* feature: implement promise-based functions
closes #208

* test: improve static tests

Author: Greg Bowler

composer.json

@@ -12,7 +12,15 @@
 
 	"require": {
 		"php": ">=8.1",
+		"ext-dom": "*",
+		"ext-curl": "*",
 		"phpgt/input": "^1.2",
+		"phpgt/typesafegetter": "^1.3",
+		"phpgt/promise": "^2.2",
+		"phpgt/async": "^1.0",
+		"phpgt/json": "^1.2",
+		"phpgt/curl": "^3.1",
+		"phpgt/propfunc": "^1.0",
 		"psr/http-message": "^2.0",
 		"willdurand/negotiation": "3.1.0"
 	},