fix(package): copy .nojekyll to build dir

This enables github to host openscd.github.io

Author: ca-d

package.json

@@ -64,7 +64,7 @@
     "release:minor": "standard-version --release-as minor",
     "release:patch": "standard-version --release-as patch",
     "release:major": "standard-version --release-as major",
-    "build": "npm run test && npm run build:notest",
+    "build": "npm run test && npm run build:notest && cp .nojekyll build/",
     "build:notest": "npm run doc && snowpack build && workbox generateSW workbox-config.cjs",
     "start": "snowpack dev"
   },