Remove server push header method, as support is virtually non-existent

src/View.php

@@ -98,19 +98,6 @@ abstract class View
 		return $this;
 	}
 
-	/**
-	 * Add an http2 server push header
-	 *
-	 * @param string $path - The host-relative path to the asset
-	 * @param string $type - The type of asset
-	 * @return ViewInterface
-	 */
-	public function addPushHeader(string $path, string $type): ViewInterface
-	{
-		$this->addHeader('Link', "<{$path}>; rel=preload; as={$type}");
-		return $this;
-	}
-
 	/**
 	 * Set the output string
 	 *

src/ViewInterface.php

@@ -47,6 +47,15 @@ interface ViewInterface {
 	 */
 	public function appendOutput(string $string): self;
 
+	/**
+	 * Add an http header
+	 *
+	 * @param string $name
+	 * @param string|string[] $value
+	 * @return ViewInterface
+	 */
+	public function addHeader(string $name, $value): self;
+
 	/**
 	 * Get the current output as a string. Does not
 	 * render view or send headers.