update JS interop - remove JS typedef references

[devoncarew]

• update JS interop - remove JS typedef references
• fix https://github.com/dart-lang/setup-dart/issues/95

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[devoncarew]

Compilation issues I'm seeing locally:

> dart compile js --enable-experiment=inline-class -olib/main.js lib/main.dart && dart tool/sig.dart --generate

lib/node/actions/core.dart:11:14:
Error: Inline class 'Core' is marked with a '@JS' annotation, but its representation type is not a valid JS interop type: 'InvalidType(<invalid>)'.
inline class Core {
             ^
lib/node/actions/core.dart:12:19:
Error: Inline class member is marked 'external', but the representation type of its inline class is not a valid JS interop type.
  external String getInput(String name);
                  ^
lib/node/actions/core.dart:14:17:
Error: Inline class member is marked 'external', but the representation type of its inline class is not a valid JS interop type.
  external void setOutput(String name, String value);
                ^
lib/node/actions/core.dart:16:17:
Error: Inline class member is marked 'external', but the representation type of its inline class is not a valid JS interop type.
  external void info(String name);
                ^
lib/node/actions/core.dart:17:17:
Error: Inline class member is marked 'external', but the representation type of its inline class is not a valid JS interop type.
  external void warning(String name);
                ^
lib/node/actions/core.dart:18:17:
Error: Inline class member is marked 'external', but the representation type of its inline class is not a valid JS interop type.
  external void error(String name);
                ^
...

[srujzs]

Nice, looking good! You're getting those errors because you have to declare a representation field/type on every inline class (now possibly called extension type!). For your purposes, it'll likely always be JSObject. Once the CFE makes it an error to not have a representation field, this will be more obvious.

[devoncarew]

cc @mit-mit for FYI re: the updates for the latest inline classes impl.

[mit-mit]

Thanks @devoncarew, looks nice