add missing externs to repo

externs/webextension_polyfill/proxy/OnErrorErrorType.hx

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+package webextension_polyfill.proxy;
+
+typedef OnErrorErrorType = { };

externs/webextension_polyfill/proxy/OnRequestDetailsType.hx

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+package webextension_polyfill.proxy;
+
+typedef OnRequestDetailsType = {
+	/**
+		The ID of the request. Request IDs are unique within a browser session. As a result,
+		they could be used to relate different events of the same request.
+	**/
+	var requestId : String;
+	var url : String;
+	/**
+		Standard HTTP method.
+	**/
+	var method : String;
+	/**
+		The value 0 indicates that the request happens in the main frame; a positive value indicates the ID of a subframe in
+		which the request happens. If the document of a (sub-)frame is loaded (<code>type</code> is <code>main_frame</code>
+		or <code>sub_frame</code>), <code>frameId</code> indicates the ID of this frame, not the ID of the outer frame.
+		Frame IDs are unique within a tab.
+	**/
+	var frameId : Float;
+	/**
+		ID of frame that wraps the frame which sent the request. Set to -1 if no parent frame exists.
+	**/
+	var parentFrameId : Float;
+	/**
+		True for private browsing requests.
+		Optional.
+	**/
+	@:optional
+	var incognito : Bool;
+	/**
+		The cookie store ID of the contextual identity.
+		Optional.
+	**/
+	@:optional
+	var cookieStoreId : String;
+	/**
+		URL of the resource that triggered this request.
+		Optional.
+	**/
+	@:optional
+	var originUrl : String;
+	/**
+		URL of the page into which the requested resource will be loaded.
+		Optional.
+	**/
+	@:optional
+	var documentUrl : String;
+	/**
+		The ID of the tab in which the request takes place. Set to -1 if the request isn't related to a tab.
+	**/
+	var tabId : Float;
+	/**
+		How the requested resource will be used.
+	**/
+	var type : webextension_polyfill.declarativenetrequest.ResourceType;
+	/**
+		The time when this signal is triggered, in milliseconds since the epoch.
+	**/
+	var timeStamp : Float;
+	/**
+		Indicates if this response was fetched from disk cache.
+	**/
+	var fromCache : Bool;
+	/**
+		The HTTP request headers that are going to be sent out with this request.
+		Optional.
+	**/
+	@:optional
+	var requestHeaders : webextension_polyfill.webrequest.HttpHeaders;
+	/**
+		Url classification if the request has been classified.
+	**/
+	var urlClassification : webextension_polyfill.webrequest.UrlClassification;
+	/**
+		Indicates if this request and its content window hierarchy is third party.
+	**/
+	var thirdParty : Bool;
+};

externs/webextension_polyfill/proxy/OnRequestEvent.hx

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+package webextension_polyfill.proxy;
+
+/**
+	Fired when proxy data is needed for a request.
+**/
+typedef OnRequestEvent = {
+	/**
+		Registers an event listener <em>callback</em> to an event.
+	**/
+	function addListener(callback:(details:OnRequestDetailsType) -> Void, filter:webextension_polyfill.webrequest.RequestFilter, ?extraInfoSpec:Array<String>):Void;
+	/**
+		Deregisters an event listener <em>callback</em> from an event.
+	**/
+	function removeListener(callback:(details:OnRequestDetailsType) -> Void):Void;
+	function hasListener(callback:(details:OnRequestDetailsType) -> Void):Bool;
+	function hasListeners():Bool;
+};

externs/webextension_polyfill/proxy/ProxyConfig.hx

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+package webextension_polyfill.proxy;
+
+/**
+	An object which describes proxy settings.
+**/
+typedef ProxyConfig = {
+	/**
+		The type of proxy to use.
+		Optional.
+	**/
+	@:optional
+	var proxyType : ProxyConfigProxyTypeEnum;
+	/**
+		The address of the http proxy, can include a port.
+		Optional.
+	**/
+	@:optional
+	var http : String;
+	/**
+		Use the http proxy server for all protocols.
+		Optional.
+	**/
+	@:optional
+	var httpProxyAll : Bool;
+	/**
+		The address of the ssl proxy, can include a port.
+		Optional.
+	**/
+	@:optional
+	var ssl : String;
+	/**
+		The address of the socks proxy, can include a port.
+		Optional.
+	**/
+	@:optional
+	var socks : String;
+	/**
+		The version of the socks proxy.
+		Optional.
+	**/
+	@:optional
+	var socksVersion : Float;
+	/**
+		A list of hosts which should not be proxied.
+		Optional.
+	**/
+	@:optional
+	var passthrough : String;
+	/**
+		A URL to use to configure the proxy.
+		Optional.
+	**/
+	@:optional
+	var autoConfigUrl : String;
+	/**
+		Do not prompt for authentication if password is saved.
+		Optional.
+	**/
+	@:optional
+	var autoLogin : Bool;
+	/**
+		Proxy DNS when using SOCKS v5.
+		Optional.
+	**/
+	@:optional
+	var proxyDNS : Bool;
+	/**
+		If true (the default value), do not use newer TLS protocol features that might have interoperability problems on the
+		Internet. This is intended only for use with critical infrastructure like the updates,
+		and is only available to privileged addons.
+		Optional.
+	**/
+	@:optional
+	var respectBeConservative : Bool;
+};

externs/webextension_polyfill/proxy/ProxyConfigProxyTypeEnum.hx

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+package webextension_polyfill.proxy;
+
+/**
+	The type of proxy to use.
+**/
+typedef ProxyConfigProxyTypeEnum = String;

externs/webextension_polyfill/proxy/Static.hx

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+package webextension_polyfill.proxy;
+
+typedef Static = {
+	/**
+		Fired when proxy data is needed for a request.
+	**/
+	var onRequest : OnRequestEvent;
+	/**
+		Notifies about errors caused by the invalid use of the proxy API.
+	**/
+	var onError : webextension_polyfill.events.Event<(error:OnErrorErrorType) -> Void>;
+	/**
+		Configures proxy settings. This setting's value is an object of type ProxyConfig.
+	**/
+	var settings : webextension_polyfill.types.Setting;
+};