add typescript build task

.vscode/tasks.json

@@ -5,11 +5,14 @@
     "tasks": [
         {
             "type": "typescript",
-            "tsconfig": "tsconfig.json",
+            "tsconfig": "tsconfig.build.json",
             "problemMatcher": [
                 "$tsc"
             ],
-            "group": "build"
+            "group": {
+                "kind": "build",
+                "isDefault": true,
+            },
         }
     ]
 }

tsconfig.build.json

@@ -0,0 +1,21 @@
+{
+  "compileOnSave": true,
+  "compilerOptions": {
+    "composite": true,
+  },
+  "references": [
+    {
+      "path": "packages/idb-bridge/"
+    },
+    {
+      "path": "packages/taler-wallet-core/"
+    },
+    {
+      "path": "packages/taler-integrationtests"
+    },
+    {
+      "path": "packages/taler-wallet-cli"
+    }
+  ],
+  "files": []
+}