LibJS: Add Float{32,64}Array

Author: https://github.com/linusg
Commit: a70aacd7c3
Pull-request: https://github.com/SerenityOS/serenity/pull/4335

Libraries/LibJS/Tests/builtins/ArrayBuffer/ArrayBuffer.isView.js

@@ -1,5 +1,14 @@
 // Update when more typed arrays get added
-const TYPED_ARRAYS = [Uint8Array, Uint16Array, Uint32Array, Int8Array, Int16Array, Int32Array];
+const TYPED_ARRAYS = [
+    Uint8Array,
+    Uint16Array,
+    Uint32Array,
+    Int8Array,
+    Int16Array,
+    Int32Array,
+    Float32Array,
+    Float64Array,
+];
 
 test("basic functionality", () => {
     expect(ArrayBuffer.isView).toHaveLength(1);