Add a missing decimal.h.

TkTech · TkTech · commit 1ea17a3b0a56 · 2025-02-06T18:12:42.000-05:00
diff --git a/MANIFEST.in b/MANIFEST.in
@@ -4,4 +4,5 @@ include yyjson/yyjson.c
 include yyjson/memory.c
 include yyjson/memory.h
 include yyjson/document.c
-include yyjson/document.h
+include yyjson/document.h
+include yyjson/decimal.h
