chore: build against lowest and current version of TS (#1625)

.github/workflows/minimum-version-ts-check.yaml

@@ -0,0 +1,46 @@
+name: Library checks
+
+on:
+    pull_request:
+    push:
+        branches:
+            - main
+
+jobs:
+    unit:
+        name: Check minimum TS version
+        runs-on: ubuntu-latest
+        strategy:
+          matrix:
+            node-version: [ 16, 18, 20, 22, 23 ]
+            typescript-version: ['4.7.2', '5.5.4', 'latest' ]
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+
+            - name: Setup pnpm
+              uses: pnpm/action-setup@v4
+              with:
+                version: 8.x.x
+
+            - name: Setup Node.js
+              uses: actions/setup-node@v4
+              with:
+                node-version: ${{ matrix.node-version }}
+                cache: 'pnpm'
+
+            - name: Install dependencies
+              run: pnpm install
+
+            - name: Build project
+              run: pnpm run build
+
+            # once its built we can see if we can use it on the forced version
+            - name: Override TypeScript version
+              run: pnpm add typescript@${{ matrix.typescript-version }} --save-dev
+
+            - name: Test TypeScript Import
+              run: |
+                rm test.ts || true
+                echo "import { posthog } from './dist/module'; console.log(posthog);" > test.ts
+                pnpm exec tsc test.ts --strict --target es2017 --module commonjs --moduleResolution node --noEmit --skipLibCheck

README.md

@@ -13,6 +13,8 @@ we use pnpm.
 it's best to install using `npm install -g pnpm@latest-8`
 and then `pnpm` commands as usual
 
+## 
+
 ## Testing
 
 Unit tests: run `pnpm test`.