Elevate requirements to Node >=19

Author: steveluscher

.github/workflows/pull-request-js.yml

@@ -54,7 +54,9 @@ jobs:
             token-swap,
           ]
         include:
-          # Restrict single-pool and token-lending to supported Node.js versions.
+          # Restrict certain packages to supported Node.js versions.
+          - package: libraries
+            node-version: 20.x
           - package: single-pool
             node-version: 20.5
           - package: token-lending

libraries/type-length-value/js/package.json

@@ -8,7 +8,7 @@
     "type": "module",
     "sideEffects": false,
     "engines": {
-        "node": ">=16"
+        "node": ">=19"
     },
     "files": [
         "lib",