[BUG] Can't chain operations

[Aayan]

Describe the bug
Chaining operations results in an error. As an example, for "foo".length.isEven. The attribute access is handled as "foo.(length.isEven)" rather than (foo.length).isEven

To Reproduce
Steps to reproduce the behavior:

1. Launch birb shell with the birb command
2. Type

String str = "Foo";
bool isEven = str.length.isEven;

4. See error

Expected behavior
Expect bool isEven to be false

Logs

Unhandled exception:
UndefinedVariableException: Error: [Line 2] Undefined variable `length`.
#0      visitVariable (package:Birb/runtime/runtime.dart:407:3)
<asynchronous suspension>
#1      visit (package:Birb/runtime/runtime.dart:211:20)
#2      visitAttAccess (package:Birb/runtime/runtime.dart:900:22)
#3      visit (package:Birb/runtime/runtime.dart:267:20)
#4      visitAttAccess (package:Birb/runtime/runtime.dart:1011:24)
<asynchronous suspension>
#5      visit (package:Birb/runtime/runtime.dart:267:20)
#6      visitVarDef (package:Birb/runtime/runtime.dart:438:34)
#7      visit (package:Birb/runtime/runtime.dart:213:20)
#8      visitCompound (package:Birb/runtime/runtime.dart:866:25)
<asynchronous suspension>
#9      visit (package:Birb/runtime/runtime.dart:241:20)
#10     main (package:Birb/birb.dart:93:9)
#11     _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:299:32)
#12     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

Process finished with exit code 255

[Aayan]

Corrected in bd1cc24