feat(apigatewayv2): http api - jwt and cognito user pool authorizers

packages/@aws-cdk/aws-apigatewayv2-authorizers/.eslintrc.js

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+const baseConfig = require('cdk-build-tools/config/eslintrc');
+baseConfig.parserOptions.project = __dirname + '/tsconfig.json';
+module.exports = baseConfig;

packages/@aws-cdk/aws-apigatewayv2-authorizers/.gitignore

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+*.d.ts
+*.generated.ts
+*.js
+*.js.map
+*.snk
+.jsii
+.LAST_BUILD
+.LAST_PACKAGE
+nyc.config.js
+.nyc_output
+coverage
+dist
+tsconfig.json
+!.eslintrc.js
+!jest.config.js
+
+junit.xml

packages/@aws-cdk/aws-apigatewayv2-authorizers/.npmignore

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+# The basics
+*.ts
+*.tgz
+*.snk
+!*.d.ts
+!*.js
+**/cdk.out
+
+# Coverage
+coverage
+.nyc_output
+.nycrc
+
+# Build gear
+dist
+.LAST_BUILD
+.LAST_PACKAGE
+
+*.tsbuildinfo
+tsconfig.json
+!.jsii
+.eslintrc.js
+jest.config.js
+
+# exclude cdk artifacts
+**/cdk.out
+junit.xml
+test/

packages/@aws-cdk/aws-apigatewayv2-authorizers/LICENSE

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packages/@aws-cdk/aws-apigatewayv2-authorizers/NOTICE

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+AWS Cloud Development Kit (AWS CDK)
+Copyright 2018-2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.

packages/@aws-cdk/aws-apigatewayv2-authorizers/README.md

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+# AWS APIGatewayv2 Authorizers
+<!--BEGIN STABILITY BANNER-->
+
+---
+
+![cdk-constructs: Experimental](https://img.shields.io/badge/cdk--constructs-experimental-important.svg?style=for-the-badge)
+
+> The APIs of higher level constructs in this module are experimental and under active development.
+> They are subject to non-backward compatible changes or removal in any future version. These are
+> not subject to the [Semantic Versioning](https://semver.org/) model and breaking changes will be
+> announced in the release notes. This means that while you may use them, you may need to update
+> your source code when upgrading to a newer version of this package.
+
+---
+
+<!--END STABILITY BANNER-->
+
+## Table of Contents
+
+- [HTTP APIs](#http-apis)
+- [JWT Authorizers](#jwt-authorizers)
+  - [User Pool Authorizer](#user-pool-authorizer)
+
+## HTTP APIs
+
+API Gateway supports multiple mechanisms for controlling and managing access to your HTTP API. They are mainly
+classified into Lambda Authorizers, JWT authorizers and standard AWS IAM roles and policies. More information is
+available at [Controlling and managing access to an HTTP
+API](https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-access-control.html).
+
+## JWT Authorizers
+
+JWT authorizers allow the use of JSON Web Tokens (JWTs) as part of [OpenID Connect](https://openid.net/specs/openid-connect-core-1_0.html) and [OAuth 2.0](https://oauth.net/2/) frameworks to allow and restrict clients from accessing HTTP APIs.
+
+When configured on a route, the API Gateway service validates the JWTs submitted by the client, and allows or denies access based on its content.
+
+```ts
+const authorizer = new HttpJwtAuthorizer({
+  jwtAudience: ['3131231'],
+  jwtIssuer: 'https://test.us.auth0.com',
+});
+
+const api = new HttpApi(stack, 'HttpApi');
+
+api.addRoutes({
+  integration: new HttpProxyIntegration({
+    url: 'https://get-books-proxy.myproxy.internal',
+  }),
+  path: '/books',
+  authorizer,
+});
+```
+
+### User Pool Authorizer
+
+User Pool Authorizer is a type of JWT Authorizer that uses a Cognito user pool and app client to control who can access your Api. After a successful authorization from the app client, the generated access token will be used as the JWT.
+
+```ts
+const userPool = new UserPool(stack, 'UserPool');
+const userPoolClient = userPool.addClient('UserPoolClient');
+
+const authorizer = new HttpUserPoolAuthorizer({
+  userPool,
+  userPoolClient,
+});
+
+const api = new HttpApi(stack, 'HttpApi');
+
+api.addRoutes({
+  integration: new HttpProxyIntegration({
+    url: 'https://get-books-proxy.myproxy.internal',
+  }),
+  path: '/books',
+  authorizer,
+});
+```

packages/@aws-cdk/aws-apigatewayv2-authorizers/jest.config.js

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+const baseConfig = require('cdk-build-tools/config/jest.config');
+module.exports = {
+  ...baseConfig,
+  coverageThreshold: {
+      global: {
+          ...baseConfig.coverageThreshold.global,
+          branches: 70,
+      },
+  },
+};

packages/@aws-cdk/aws-apigatewayv2-authorizers/lib/http/index.ts

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+export * from './user-pool';
+export * from './jwt';