bring proxy stuff together

add http.proxyStrictSSL option

fixes #155

src/typings/https-proxy-agent.d.ts

@@ -5,8 +5,19 @@
 
 declare module 'https-proxy-agent' {
 
+	import * as tls from 'tls';
+
+	interface IHttpsProxyAgentOptions extends tls.ConnectionOptions {
+		host: string;
+		port: number;
+		secureProxy?: boolean;
+		secureEndpoint?: boolean;
+	}
+
 	class HttpsProxyAgent {
 		constructor(proxy: string);
+		constructor(opts: IHttpsProxyAgentOptions);
 	}
+
 	export = HttpsProxyAgent;
 }