Replace nyc with c8

nyc does not work with ESM called with require().

Author: CxRes

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
     # test code
     - run: npm run standard
     - run: npm run validate
-    - run: npm run nyc
+    - run: npm run c8
     # Test global install of the package
     - run: npm pack .
     - run: npm install -g solid-server-*.tgz