Add Node.js <10.x end of support postinstall script (#3727)

.changes/next-release/feature-Node.js-25435344.json

@@ -0,0 +1,5 @@
+{
+  "type": "feature",
+  "category": "Node.js",
+  "description": "Add postinstall script warning end-of-support for Node.js <10.x"
+}

package.json

@@ -144,6 +144,7 @@
     "translate-api-test": "mocha scripts/lib/translate-api.spec.js",
     "typings-generator-test": "mocha scripts/lib/prune-shapes.spec.js",
     "helper-test": "mocha scripts/lib/test-helper.spec.js",
-    "csm-functional-test": "mocha test/publisher/functional_test"
+    "csm-functional-test": "mocha test/publisher/functional_test",
+    "postinstall": "node scripts/check-node-version.js"
   }
-}
+}

scripts/check-node-version.js

@@ -0,0 +1,8 @@
+var version = process.version;
+
+if (version && parseInt(version.substring(1, version.indexOf('.'))) < 10) {
+  console.warn('The AWS SDK for JavaScript (v2) will no longer support Node.js ' + version
+  + '\nas of November 1, 2021. To continue receiving updates to AWS services'
+  + '\nand bug fixes please upgrade to Node.js 10.x or later.'
+  + '\n\nMore information can be found at: https://a.co/cf10B3y');
+}