new features:
- auto update gop cache file
- cl: toType support ast.ParentExpr
- cl: fix getTypeLoader redefine (add TestTypeLoader, TestErrTypeRedefine)
- cl: SwitchStmt check duplicate
- cl: type switch check duplicate
- Add modfile package which can be used to parse gop.mod
changes:
- mv tutorial => https://github.com/goplus/tutorial
- allow println {}
- github.com/goplus/gox v1.7.18