chore: setup releases for v3 release candidates (#52)

Release the initial release candidate for V3. These are not yet subject to semantic versioning.

.projenrc.ts

@@ -2,15 +2,17 @@ import { typescript } from 'projen';
 const project = new typescript.TypeScriptProject({
   name: 'cdk-assets',
   projenrcTs: true,
-  publishDryRun: true,
   defaultReleaseBranch: 'main',
   majorVersion: 3,
   prerelease: 'rc',
   releaseBranches: {
     'v2-main': {
       majorVersion: 2,
+      npmDistTag: 'latest',
     },
   },
+  releaseToNpm: true,
+  npmDistTag: 'v3-latest',
   autoApproveUpgrades: true,
   autoApproveOptions: {
     allowedUsernames: ['aws-cdk-automation'],
@@ -92,7 +94,13 @@ const project = new typescript.TypeScriptProject({
     include: ['bin/**/*.ts'],
   },
   srcdir: 'lib',
-  gitignore: ['**/*.d.ts', '**/*.js', '**/.DS_Store'],
+  gitignore: ['**/*.d.ts', '**/*.js', '**/.DS_Store', 'npm-shrinkwrap.json'],
+  releaseWorkflowSetupSteps: [
+    {
+      name: 'Shrinkwrap',
+      run: 'npx projen shrinkwrap',
+    },
+  ],
 });
 
 project.addPackageIgnore('*.ts');
@@ -105,4 +113,21 @@ project.eslint?.addRules({
   ],
 });
 
+project.addTask('shrinkwrap', {
+  steps: [
+    {
+      spawn: 'bump',
+    },
+    {
+      exec: 'npm shrinkwrap',
+    },
+    {
+      spawn: 'unbump',
+    },
+    {
+      exec: 'git checkout HEAD -- yarn.lock',
+    },
+  ],
+});
+
 project.synth();

README.md

@@ -1,5 +1,19 @@
 # cdk-assets
 
+<!--BEGIN STABILITY BANNER-->
+
+---
+
+> V3 of cdk-assets is still under active development and is subject to non-backward compatible changes while
+> being released with the `rc` suffix. 
+> 
+> These changes are not subject to the [Semantic Versioning](https://semver.org/) model and breaking changes 
+> will be announced in the release notes.
+
+---
+
+<!--END STABILITY BANNER-->
+
 A tool for publishing CDK assets to AWS environments.
 
 ## Overview
@@ -39,7 +53,8 @@ asset, or the name of the local Docker image.
 
 The `cdk-asset` tool can be used programmatically and via the CLI. Use
 programmatic access if you need more control over authentication than the
-default [`aws-sdk`](https://github.com/aws/aws-sdk-js) implementation allows.
+default [AWS SDK for JavaScript v3](https://github.com/aws/aws-sdk-js-v3) 
+implementation allows.
 
 Command-line use looks like this: