chore: increment version number 1.3 -> 1.4

README.md

···
 Vim-like bindings and a minimalist interface, Jido focuses on speed and
 simplicity.
 
-Jido used Zig `0.14.0`.
+Jido is built with Zig v`0.15.2`.
 
 - [Installation](#installation)
 - [Integrations](#integrations)

build.zig

···
 const builtin = @import("builtin");
 
 ///Must match the `version` in `build.zig.zon`.
-const version = std.SemanticVersion{ .major = 1, .minor = 3, .patch = 0 };
+const version = std.SemanticVersion{ .major = 1, .minor = 4, .patch = 0 };
 
 const targets: []const std.Target.Query = &.{
     .{ .cpu_arch = .aarch64, .os_tag = .macos },