Use npm-release of raphael

Other dependencies already depend on npm-releases of this, so it does not seem to make sense to get this via Git.

Signed-off-by: David Mehren <git@herrmehren.de>
Co-authored-by: Yannick Bungers <git@innay.de>

package.json

@@ -108,7 +108,7 @@
     "pg-hstore": "^2.3.3",
     "prismjs": "^1.21.0",
     "randomcolor": "^0.5.3",
-    "raphael": "git+https://github.com/dmitrybaranovskiy/raphael",
+    "raphael": "^2.3.0",
     "readline-sync": "^1.4.7",
     "request": "^2.88.0",
     "reveal.js": "^3.9.2",