Add sourceify global transform to preserve sourcemaps

Sourcemaps from dependent libraries like @rondo/client were not by
tsify.

https://github.com/L8D/sourceify/pull/2/files

package-lock.json

@@ -11802,6 +11802,15 @@
       "integrity": "sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM=",
       "dev": true
     },
+    "sourceify": {
+      "version": "git+https://github.com/jeremija/sourceify.git#ef7b6ddaad94bcf7bae453d0fb60625c773306f8",
+      "from": "git+https://github.com/jeremija/sourceify.git#sources-content",
+      "dev": true,
+      "requires": {
+        "convert-source-map": "^1.1.3",
+        "through2": "^2.0.0"
+      }
+    },
     "spdx-correct": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.0.tgz",

package.json

@@ -51,6 +51,7 @@
     "react-redux": "^6.0.0",
     "react-router-dom": "^4.4.0",
     "redux": "^4.0.1",
+    "sourceify": "git+https://github.com/jeremija/sourceify.git#sources-content",
     "std-mocks": "^1.0.1",
     "supertest": "^3.3.0",
     "terser": "^3.14.1",