Elevate requirements of @solana/spl-type-length-value to Node >=19

Author: steveluscher

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

@@ -54,11 +54,13 @@ jobs:
             token-swap,
           ]
         include:
-          # Restrict single-pool and token-lending to supported Node.js versions.
+          # Restrict certain packages to supported Node.js versions.
           - package: single-pool
             node-version: 20.5
           - package: token-lending
             node-version: 18.5
+          - package: type-length-value
+            node-version: 19
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4

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

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