fix: typedef files copy properly

Signed-off-by: Jan Kowalleck <[email protected]>

Author: jkowalleck

package.json

@@ -117,9 +117,10 @@
     "@types/node": "ts5.7",
     "@types/spdx-expression-parse": "^3",
     "c8": "^10",
+    "copyfiles": "^2.4.1",
     "deepmerge": "^4.2.2",
     "fast-glob": "^3.3.1",
-    "memfs": "4.46.1",
+    "memfs": "^4.46.1",
     "mocha": "11.7.2",
     "npm-run-all2": "^8",
     "rimraf": "^6",
@@ -209,6 +210,7 @@
     "build:web": "webpack build",
     "prebuild:d": "rimraf dist.d",
     "build:d": "tsc -b ./tsconfig.d.json",
+    "postbuild:d": "copyfiles -u 1 src/**/*.d.ts dist.d",
     "test": "run-p --aggregate-output -lc test:\\*",
     "test:node": "c8 mocha -p",
     "test:web": "node -e 'console.log(\"TODO: write web test\")'",