Merge branch '2.x' into 3.x

Author: cowtowncoder

release-notes/VERSION-2.x

@@ -14,7 +14,7 @@ a pure JSON library.
 === Releases ===
 ------------------------------------------------------------------------
 
-2.21.1 (not yet released)
+2.21.1 (22-Feb-2026)
 
 #1548: `StreamReadConstraints.maxDocumentLength` not checked when
   creating parser with fixed buffer
@@ -105,7 +105,7 @@ No changes since 2.19.1
  (requested by Ilenia S)
  (fixed by @pjfanning)
 
-2.18.6 (not yet released)
+2.18.6 (22-Feb-2026)
 
 #1512: Number-parsing fix for `UTF8DataInputJsonParser`
  (reported by @ventusfortis)