chore: update "string variadic" tests (#30)

* tests: test string variadic w/ actual variable string args

* fix(test): prevent syntax error

Co-authored-by: Luke Edwards <luke.edwards05@gmail.com>

Author: gingerrific

test/index.js

@@ -17,9 +17,9 @@ test('strings', t => {
 
 test('strings (variadic)', t => {
 	t.is(fn(''), '');
-	t.is(fn('foo'), 'foo');
-	t.is(fn(true && 'foo'), 'foo');
-	t.is(fn(false && 'foo'), '');
+	t.is(fn('foo', 'bar'), 'foo bar');
+	t.is(fn(true && 'foo', false && 'bar', 'baz'), 'foo baz');
+	t.is(fn(false && 'foo', 'bar', 'baz', ''), 'bar baz');
 	t.end();
 });