Add support for Bun (#20)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>

Author: BenBeattieHood

Diff for: index.js

@@ -1,7 +1,16 @@
 export default function callsites() {
 	const _prepareStackTrace = Error.prepareStackTrace;
-	Error.prepareStackTrace = (_, stack) => stack;
-	const stack = new Error().stack.slice(1); // eslint-disable-line unicorn/error-message
-	Error.prepareStackTrace = _prepareStackTrace;
-	return stack;
+	try {
+		let result = [];
+		Error.prepareStackTrace = (_, callSites) => {
+			const callSitesWithoutCurrent = callSites.slice(1);
+			result = callSitesWithoutCurrent;
+			return callSitesWithoutCurrent;
+		};
+
+		new Error().stack; // eslint-disable-line unicorn/error-message, no-unused-expressions
+		return result;
+	} finally {
+		Error.prepareStackTrace = _prepareStackTrace;
+	}
 }