chore: Update nostr-tools dependency in package-lock.json

- Bump nostr-tools version from 2.10.4 to 2.15.0, updating resolved URL and integrity hash.
- Clean up optionalDependencies section in nostr-tools entry.

package-lock.json

@@ -10821,9 +10821,9 @@
       }
     },
     "node_modules/nostr-tools": {
-      "version": "2.10.4",
-      "resolved": "https://registry.npmjs.org/nostr-tools/-/nostr-tools-2.10.4.tgz",
-      "integrity": "sha512-biU7sk+jxHgVASfobg2T5ttxOGGSt69wEVBC51sHHOEaKAAdzHBLV/I2l9Rf61UzClhliZwNouYhqIso4a3HYg==",
+      "version": "2.15.0",
+      "resolved": "https://registry.npmjs.org/nostr-tools/-/nostr-tools-2.15.0.tgz",
+      "integrity": "sha512-Jj/+UFbu3JbTAWP4ipPFNuyD4W5eVRBNAP+kmnoRCYp3bLmTrlQ0Qhs5O1xSQJTFpjdZqoS0zZOUKdxUdjc+pw==",
       "license": "Unlicense",
       "dependencies": {
         "@noble/ciphers": "^0.5.1",
@@ -10831,9 +10831,7 @@
         "@noble/hashes": "1.3.1",
         "@scure/base": "1.1.1",
         "@scure/bip32": "1.3.1",
-        "@scure/bip39": "1.2.1"
-      },
-      "optionalDependencies": {
+        "@scure/bip39": "1.2.1",
         "nostr-wasm": "0.1.0"
       },
       "peerDependencies": {
@@ -10849,8 +10847,7 @@
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/nostr-wasm/-/nostr-wasm-0.1.0.tgz",
       "integrity": "sha512-78BTryCLcLYv96ONU8Ws3Q1JzjlAt+43pWQhIl86xZmWeegYCNLPml7yQ+gG3vR6V5h4XGj+TxO+SS5dsThQIA==",
-      "license": "MIT",
-      "optional": true
+      "license": "MIT"
     },
     "node_modules/npm-run-path": {
       "version": "2.0.2",