title: Argument of type 'this' is not assignable to parameter of type 'Construct' in AWS CDK
body: <p>I am having an issue while using the CDK in that the <code>this</code> property is erroring and saying that I can't assign 'this' to parameter of type construct. This is happens start on the <code>const s3ListLambdaRole</code> part and makes every new variable declaration after that also error for the same thing.</p>
  <pre><code>import * as sns from '@aws-cdk/aws-sns';
  import * as subs from '@aws-cdk/aws-sns-subscriptions';
  import * as sqs from '@aws-cdk/aws-sqs';
  import * as cdk from '@aws-cdk/core';
  import * as s3 from '@aws-cdk/aws-s3';
  import * as lambda from '@aws-cdk/aws-lambda';
  import * as path from 'path';
  import { Bucket } from '@aws-cdk/aws-s3';
  import * as iam from'@aws-cdk/aws-iam';
  
  
  export class SecurityBaselineDevStack extends cdk.Stack {
    constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
      super(scope, id, props);
  
      const testSecurityqueue = new sqs.Queue(this, 'testSecurityqueue', {
        visibilityTimeout: cdk.Duration.seconds(300)
      });
  
      const testSecuritytopic = new sns.Topic(this, 'testSecuritytopic');
  
        testSecuritytopic.addSubscription(new subs.SqsSubscription(testSecurityqueue));
      //Creating lambda role below
      const s3ListLambdaRole = new iam.Role(this, 's3ListLambdaRole', {
        assumedBy: new iam.ServicePrincipal('lambda.amazonaws.com'),
      });
  
      s3ListLambdaRole.addManagedPolicy(iam.ManagedPolicy.fromAwsManagedPolicyName('AWSLambdaFullAccess')) //creates LambdaFullAccess Role
  
      //Adding specific permissions to role now
  
      s3ListLambdaRole.addToPolicy(new iam.PolicyStatement({
        resources: ['*'], //adds full access to lamda
        actions: ['s3']
      }));
  
      const s3ListLambda = new lambda.Function (this, 's3ListLambda', {
        runtime: lambda.Runtime.PYTHON_3_6,
        handler: 'listS3.handler',
        role:s3ListLambdaRole,
        code: lambda.Code.fromAsset(path.join(__dirname, '../lambda'))
      });
  
      const testSecurityBucket = new s3.Bucket(this, 'testSecurityBucket');
  
  
  
  
  
  
      }
  
    }
  </code></pre>
  <p>Thank you in advance!</p>