bump sodium-universal to 5.0.0 (#16)

Author: telamon

package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "b4a": "^1.1.0",
     "nanoassert": "^2.0.0",
-    "sodium-universal": "^4.0.0"
+    "sodium-universal": "^5.0.0"
   },
   "devDependencies": {
     "brittle": "^3.3.2",