Remove try catch from provided functions, user handles errors

src/functions/flatMap.ts

@@ -13,21 +13,8 @@ export function flatMap<T, R>(
     return new Transform({
         ...options,
         async transform(chunk: T, encoding, callback) {
-            let isPromise = false;
-            try {
-                const mapped = mapper(chunk, encoding);
-                isPromise = mapped instanceof Promise;
-                (await mapped).forEach(c => this.push(c));
-                callback();
-            } catch (err) {
-                if (isPromise) {
-                    // Calling the callback asynchronously with an error wouldn't emit the error, so emit directly
-                    this.emit("error", err);
-                    callback();
-                } else {
-                    callback(err);
-                }
-            }
+            (await mapper(chunk, encoding)).forEach(c => this.push(c));
+            callback();
         },
     });
 }