Enable rebuild of demo when lib changes

PowerKiKi · PowerKiKi · commit 595102d03b61 · 2018-05-30T20:35:10.000+09:00
As seen in angular/angular-cli#10643 (comment)
diff --git a/tsconfig.json b/tsconfig.json
@@ -18,7 +18,7 @@
         ],
         "paths": {
             "@ecodev/natural-search": [
-                "dist/natural-search"
+                "projects//natural-search/src/public_api"
             ],
             "@ecodev/natural-search/*": [
                 "dist/natural-search/*"
