fix buffer import and use rollup for transpiling the package.

event.js

@@ -1,4 +1,4 @@
-import {Buffer} from 'buffer'
+import Buffer from 'buffer'
 import * as secp256k1 from '@noble/secp256k1'
 
 import {sha256} from './utils'

nip04.js

@@ -1,4 +1,4 @@
-import {Buffer} from 'buffer'
+import Buffer from 'buffer'
 import * as secp256k1 from '@noble/secp256k1'
 
 export function encrypt(privkey, pubkey, text) {

nip05.js

@@ -1,4 +1,4 @@
-import {Buffer} from 'buffer'
+import Buffer from 'buffer'
 import dnsPacket from 'dns-packet'
 
 const dohProviders = [

package.json

@@ -1,7 +1,10 @@
 {
   "name": "nostr-tools",
-  "version": "0.6.5",
+  "version": "0.6.3",
   "description": "Tools for making a Nostr client.",
+  "main": "dist/nostr-tools.esm.min.js",
+  "module": "dist/nostr-tools.esm.min.js",
+  "browser": "dist/nostr-tools.umd.min.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/fiatjaf/nostr-tools.git"
@@ -23,5 +26,11 @@
     "censorship",
     "censorship-resistance",
     "client"
-  ]
+  ],
+  "devDependencies": {
+    "rollup": "^2.61.1"
+  },
+  "scripts": {
+    "prepublish": "rollup -c"
+  }
 }