pnpm: migrate from lerna to pnpm

.changeset/README.md

@@ -0,0 +1,8 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

.changeset/config.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://unpkg.com/@changesets/[email protected]/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "linked": [],
+  "access": "restricted",
+  "baseBranch": "master",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.github/workflows/github-actions-build.yml

@@ -22,6 +22,14 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'npm'
-      - run: npx lerna bootstrap --ci
-      - run: npm run build
-      - run: npm test
+      # https://pnpm.io/continuous-integration
+      - name: Cache .pnpm-store
+        uses: actions/cache@v1
+        with:
+          path: ~/.pnpm-store
+          key: ${{ runner.os }}-node${{ matrix.node-version }}-${{ hashFiles('**/pnpm-lock.yaml') }}
+      - name: Install pnpm
+        run: curl -f https://get.pnpm.io/v6.14.js | node - add --global pnpm@6
+      - run: pnpm install
+      - run: pnpm build
+      - run: pnpm test

README.md

@@ -8,7 +8,7 @@ See [OpenAPI Generator+ CLI](https://github.com/karlvr/openapi-generator-plus/tr
 
 ## Building the project
 
-This project uses [nvm](https://github.com/nvm-sh/nvm) for managing the versions of node and npm, and [lerna](https://github.com/lerna/lerna) for managing the monorepo project structure.
+This project uses [nvm](https://github.com/nvm-sh/nvm) for managing the versions of node, and [pnpm](https://pnpm.io) for installing packages and managing the monorepo project structure.
 
 To setup `nvm`:
 
@@ -17,16 +17,22 @@ nvm install
 nvm use
 ```
 
+To install pnpm:
+
+```shell
+npm -g install pnpm
+```
+
 To install and build the project:
 
 ```shell
-npx lerna bootstrap
-npm run build
-npm run watch
+pnpm install
+pnpm build
+pnpm watch
 ```
 
 To run the tests:
 
 ```shell
-npm test
+pnpm test
 ```