Updating CHANGELOG.md and 3rd_party_licenses.txt.

Author: iamstolis

3rd_party_licenses.txt

@@ -931,7 +931,7 @@ THE POSSIBILITY OF SUCH DAMAGE.
 
 ================================================================================
 
-Node.js 12.20.1
+Node.js 12.21.0
 
 Node.js is licensed for use as follows:
 

CHANGELOG.md

@@ -3,6 +3,9 @@
 This changelog summarizes major changes between GraalVM versions of the GraalVM JavaScript (ECMAScript) language runtime.
 The main focus is on user-observable behavior of the engine.
 
+## Version 20.3.2
+* Updated Node.js to version 12.21.0.
+
 ## Version 20.3.1
 * Updated Node.js to version 12.20.1.