fix: Remove unnecessary bun-types directives

Closes #478

package.json

@@ -100,7 +100,8 @@
     "build:esm": "tsc -b tsconfig.esm.json && node scripts/esm-post-process.mjs",
     "build:cjs": "tsc -b tsconfig.cjs.json",
     "build:umd": "rollup --bundleConfigAsCjs --config rollup.config.ts --configPlugin typescript && gzip umd/graphql-ws.min.js -c > umd/graphql-ws.min.js.gz",
-    "build": "yarn build:esm && yarn build:cjs && yarn build:umd",
+    "build": "yarn build:esm && yarn build:cjs && yarn build:umd && yarn postbuild",
+    "postbuild": "node scripts/fix-declaration-directives.mjs",
     "release": "semantic-release"
   },
   "peerDependencies": {

scripts/fix-declaration-directives.mjs

@@ -0,0 +1,22 @@
+/**
+ * Adding Bun's typings through the tripple-slash directive adds it everywhere
+ * where Node primitives are used (probably because Bun and Node share interfaces).
+ *
+ * This script removes the bun-typings directive everywhere except for Bun.
+ */
+import { glob } from 'glob';
+import fs from 'fs/promises';
+
+(async () => {
+  const matches = await glob('lib/**/*.d.?(m)ts');
+  const notBunMatches = matches.filter((match) => !match.includes('bun.d'));
+
+  const directive = '/// <reference types="bun-types" />\n';
+
+  for (const path of notBunMatches) {
+    const src = (await fs.readFile(path)).toString();
+    if (src.includes(src)) {
+      await fs.writeFile(path, src.replace(directive, ''));
+    }
+  }
+})();