Start v1.2.0 development cycle

Signed-off-by: AnErrupTion <anerruption@disroot.org>

build.zig

@@ -21,7 +21,7 @@ comptime {
     }
 }
 
-const ly_version = std.SemanticVersion{ .major = 1, .minor = 1, .patch = 0 };
+const ly_version = std.SemanticVersion{ .major = 1, .minor = 2, .patch = 0 };
 
 var dest_directory: []const u8 = undefined;
 var config_directory: []const u8 = undefined;