Mark 3.1.42 as released (#19692)

Author: sbc100

ChangeLog.md

@@ -18,8 +18,11 @@ to browse the changes between the tags.
 
 See docs/process.md for more on how version tagging works.
 
-3.1.42 (in development)
+3.1.43 (in development)
 -----------------------
+
+3.1.42 - 06/22/23
+-----------------
 - The default minimum Node version of Emscripten output was bumped from 10.19 to
   16.0. To run the output JS in an older version of node, you can use e.g.
   `-sMIN_NODE_VERSION=101900` which will apply the previous minimum version of

emscripten-version.txt

@@ -1 +1 @@
-3.1.42-git
+3.1.43-git