document errors
:: would be better to build a native binary, but this seems broken.
+:: error looks like this:
+::
+:: (%PREFIX%) %SRC_DIR%>dart compile exe bin\sass.dart -o %PREFIX%\Library\bin\sass.exe
+:: Unhandled exception:
+:: Crash when compiling null,
+:: at character offset null:
+:: Bad state: No element
+:: #0 List.single (dart:core-patch/growable_array.dart:353:22)
+:: #1 ClassBuilderImpl.buildTypeWithBuiltArguments (package:front_end/src/fasta/builder/class_builder.dart:324:44)
+:: #2 ClassBuilderImpl.buildType (package:front_end/src/fasta/builder/class_builder.dart:335:12)
+
+:: may be related to https://github.com/flutter/flutter/issues/92757
+
:: dart pub get
:: dart compile exe bin\sass.dart -o %LIBRARY_BIN%\sass.exe
