feat(neptune-alpha): add engine versions and parameter group family 1.4

packages/@aws-cdk/aws-neptune-alpha/README.md

@@ -100,7 +100,7 @@ const cluster = new neptune.DatabaseCluster(this, 'Database', {
 });
 ```
 
-Note: To use the Neptune engine versions `1.2.0.0` or later, including the newly added `1.3` series, it's necessary to specify the appropriate `engineVersion` prop in `neptune.DatabaseCluster`. Additionally, for both 1.2 and 1.3 series, the corresponding `family` prop must be set to `ParameterGroupFamily.NEPTUNE_1_2` or `ParameterGroupFamily.NEPTUNE_1_3` respectively in `neptune.ClusterParameterGroup` and `neptune.ParameterGroup`.
+Note: To use the Neptune engine versions `1.2.0.0` or later, including the newly added `1.3` and `1.4`  series, it's necessary to specify the appropriate `engineVersion` prop in `neptune.DatabaseCluster`. Additionally, for 1.2, 1.3 and 1.4 series, the corresponding `family` prop must be set to `ParameterGroupFamily.NEPTUNE_1_2`, `ParameterGroupFamily.NEPTUNE_1_3` or `ParameterGroupFamily.NEPTUNE_1_4` respectively in `neptune.ClusterParameterGroup` and `neptune.ParameterGroup`.
 
 ## Adding replicas
 

packages/@aws-cdk/aws-neptune-alpha/lib/cluster.ts

@@ -109,6 +109,26 @@ export class EngineVersion {
    * Neptune engine version 1.3.4.0
    */
   public static readonly V1_3_4_0 = new EngineVersion('1.3.4.0');
+  /**
+   * Neptune engine version 1.4.0.0
+   */
+  public static readonly V1_4_0_0 = new EngineVersion('1.4.0.0');
+  /**
+   * Neptune engine version 1.4.1.0
+   */
+  public static readonly V1_4_1_0 = new EngineVersion('1.4.1.0');
+  /**
+   * Neptune engine version 1.4.2.0
+   */
+  public static readonly V1_4_2_0 = new EngineVersion('1.4.2.0');
+  /**
+   * Neptune engine version 1.4.3.0
+   */
+  public static readonly V1_4_3_0 = new EngineVersion('1.4.3.0');
+  /**
+   * Neptune engine version 1.4.4.0
+   */
+  public static readonly V1_4_4_0 = new EngineVersion('1.4.4.0');
 
   /**
    * Constructor for specifying a custom engine version

packages/@aws-cdk/aws-neptune-alpha/lib/parameter-group.ts

@@ -19,6 +19,10 @@ export class ParameterGroupFamily {
    * Family used by Neptune engine versions 1.3.0.0 and later
    */
   public static readonly NEPTUNE_1_3 = new ParameterGroupFamily('neptune1.3');
+  /**
+   * Family used by Neptune engine versions 1.4.0.0 and later
+   */
+  public static readonly NEPTUNE_1_4 = new ParameterGroupFamily('neptune1.4');
 
   /**
    * Constructor for specifying a custom parameter group family

packages/@aws-cdk/aws-neptune-alpha/test/cluster.test.ts

@@ -120,7 +120,7 @@ describe('DatabaseCluster', () => {
   });
 
   test.each([
-    ['1.1.1.0', EngineVersion.V1_1_1_0], ['1.2.0.0', EngineVersion.V1_2_0_0], ['1.3.0.0', EngineVersion.V1_3_0_0],
+    ['1.1.1.0', EngineVersion.V1_1_1_0], ['1.2.0.0', EngineVersion.V1_2_0_0], ['1.3.0.0', EngineVersion.V1_3_0_0], ['1.4.0.0', EngineVersion.V1_4_0_0],
   ])('can create a cluster for engine version %s', (expected, version) => {
     // GIVEN
     const stack = testStack();