chore(v2): minimum supported node version is now v14 (aws#17036)

This is the current active LTS version and is a good minimum requirement.

Re-introduction of aws#11964. Fixes aws#16438


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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: rix0rrr

.yarnrc

@@ -7,3 +7,4 @@
 # be forced to registry.yarnpkg.com.
 # https://github.com/npm/cli/issues/3783
 registry "https://registry.npmjs.org"
+ignore-engines            true      # the 'engines' key for 'aws-cdk-lib' has specifies node14 as min while v1 will remain at node10

tools/@aws-cdk/pkglint/lib/rules.ts

@@ -1129,7 +1129,11 @@ export class MustHaveNodeEnginesDeclaration extends ValidationRule {
   public readonly name = 'package-info/engines';
 
   public validate(pkg: PackageJson): void {
-    expectJSON(this.name, pkg, 'engines.node', '>= 10.13.0 <13 || >=13.7.0');
+    if (cdkMajorVersion() === 2) {
+      expectJSON(this.name, pkg, 'engines.node', '>= 14.15.0');
+    } else {
+      expectJSON(this.name, pkg, 'engines.node', '>= 10.13.0 <13 || >=13.7.0');
+    }
   }
 }