build(zig): use ArrayListUnmanaged

This is supported in 0.14 and 0.15

(cherry picked from commit 298b6775c6)

build.zig

@@ -25,9 +25,11 @@ pub fn build(b: *std.Build) !void {
       .flags = &.{"-std=c11"},
     });
   } else {
+    const files = try findSourceFiles(b);
+    defer b.allocator.free(files);
     lib.addCSourceFiles(.{
       .root = b.path("lib/src"),
-      .files = try findSourceFiles(b),
+      .files = files,
       .flags = &.{"-std=c11"},
     });
   }
@@ -96,7 +98,7 @@ pub fn wasmtimeDep(target: std.Target) []const u8 {
 }
 
 fn findSourceFiles(b: *std.Build) ![]const []const u8 {
-  var sources = std.ArrayList([]const u8).init(b.allocator);
+  var sources: std.ArrayListUnmanaged([]const u8) = .empty;
 
   var dir = try b.build_root.handle.openDir("lib/src", .{ .iterate = true });
   var iter = dir.iterate();
@@ -107,9 +109,9 @@ fn findSourceFiles(b: *std.Build) ![]const []const u8 {
     const file = entry.name;
     const ext = std.fs.path.extension(file);
     if (std.mem.eql(u8, ext, ".c") and !std.mem.eql(u8, file, "lib.c")) {
-      try sources.append(b.dupe(file));
+      try sources.append(b.allocator, b.dupe(file));
     }
   }
 
-  return sources.items;
+  return sources.toOwnedSlice(b.allocator);
 }

build.zig.zon

@@ -2,6 +2,7 @@
   .name = .tree_sitter,
   .fingerprint = 0x841224b447ac0d4f,
   .version = "0.25.8",
+  .minimum_zig_version = "0.14.1",
   .paths = .{
     "build.zig",
     "build.zig.zon",