mod: bump zig version to 0.16.0

src/root.zig

@@ -202,6 +202,7 @@ const Allocator = std.mem.Allocator;
 
 test "matching `s` on local files" {
     var gpa = testing.allocator;
+    const io = testing.io;
 
     // files to fuzzy match against
     var files: std.ArrayList([]const u8) = .empty;
@@ -218,13 +219,13 @@ test "matching `s` on local files" {
     }
 
     // arrange
-    var dir = try std.fs.cwd().openDir(".", .{ .iterate = true });
-    defer dir.close();
+    var dir = try std.Io.Dir.cwd().openDir(io, ".", .{ .iterate = true });
+    defer dir.close(io);
 
     var iter = try dir.walk(gpa);
     defer iter.deinit();
 
-    while (try iter.next()) |entry| {
+    while (try iter.next(io)) |entry| {
         switch (entry.kind) {
             .file => {
                 if (std.mem.startsWith(u8, entry.path, ".git/")) continue;
@@ -249,12 +250,10 @@ test "matching `s` on local files" {
     std.sort.heap(Result, results.items, {}, greaterThan);
 
     var buf: [128]u8 = undefined;
-    var buffer = std.fs.File.stderr().writer(&buf);
-    var writer = &buffer.interface;
+    const stderr = try std.Io.lockStderr(io, &buf, .escape_codes);
+    var writer = stderr.file_writer;
     defer writer.flush() catch unreachable;
-
-    std.debug.lockStdErr();
-    defer std.debug.unlockStdErr();
+    defer std.Io.unlockStderr(io);
 
     // assert
     var scored_entries: usize = 0;