6.2: no more ip verification

- removed ip verification and updated privacy policy to reflect this change.
- streamable links now last for 20 seconds instead of 2 minutes.
- cleaned up stream verification algorithm. now the same function isn't run 4 times in a row.
- removed deprecated way of hosting a cobalt instance.

package.json

@@ -1,7 +1,7 @@
 {
     "name": "cobalt",
     "description": "save what you love",
-    "version": "6.1",
+    "version": "6.2",
     "author": "wukko",
     "exports": "./src/cobalt.js",
     "type": "module",