[hygiene] Prevent TS restart requirement for tests

Author: jamesgpearce

src/tsconfig.json

@@ -11,6 +11,7 @@
     "typeRoots": ["../node_modules/@types"],
     "moduleResolution": "node",
     "allowSyntheticDefaultImports": true,
-    "types": ["node"]
+    "types": ["node"],
+    "composite": true
   }
 }

test/tsconfig.json

@@ -19,5 +19,6 @@
       "http-server"
     ],
     "skipLibCheck": true
-  }
+  },
+  "references": [{"path": "../src"}]
 }