Allow building of types

Author: timfish

dev-packages/node-integration-tests/tsconfig.types.json

@@ -0,0 +1,10 @@
+{
+  "extends": "./tsconfig.json",
+
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "outDir": "build/types"
+  }
+}