Migrate to zig 0.16

Review threads live on the whole diff, not on one commit, so none are shown here - a thread's line means something in the branch's final form, and painting it into an intermediate step would put it on code it is not about.

src/builder.zigmodified+2-2

Changes to src/builder.zig

		⋯28 linesShow the 28 lines above this hunk@@ -29,7 +29,7 @@ pub const Builder = struct {
29	29	pub fn init(allocator: std.mem.Allocator) Builder {
30	30	return .{
31	31	.allocator = allocator,
32		- .parts = std.ArrayList([]const u8){},
	32	+ .parts = .empty,
33	33	};
34	34	}
35	35
		⋯268 linesShow the 268 lines above this hunk@@ -304,7 +304,7 @@ pub const Composer = struct {
304	304	pub fn init(allocator: std.mem.Allocator) Composer {
305	305	return .{
306	306	.allocator = allocator,
307		- .patterns = std.ArrayList([]const u8){},
	307	+ .patterns = .empty,
308	308	};
309	309	}
310	310

src/lint.zigmodified+1-1

Changes to src/lint.zig

		⋯62 linesShow the 62 lines above this hunk@@ -63,7 +63,7 @@ pub const Lint = struct {
63	63	pub fn init(allocator: std.mem.Allocator, pattern: []const u8) Lint {
64	64	return .{
65	65	.allocator = allocator,
66		- .warnings = std.ArrayList(Warning){},
	66	+ .warnings = .empty,
67	67	.pattern = pattern,
68	68	};
69	69	}