don't mark `skip-ssr` tests as skipped, omit them altogether

test/ssr.js

@@ -58,7 +58,9 @@ describe( 'ssr', () => {
 			throw new Error( 'Forgot to remove `solo: true` from test' );
 		}
 		
-		( config.skip || config['skip-ssr'] ? it.skip : config.solo ? it.only : it )( dir, () => {
+		if ( config['skip-ssr'] ) return;
+
+		( config.skip ? it.skip : config.solo ? it.only : it )( dir, () => {
 			try {
 				const source = fs.readFileSync( `test/generator/${dir}/main.html`, 'utf-8' );
 				svelte.compile( source, { generate: 'ssr' });