lobstr 1.1.3

• Changes for compliance with R's public API. The main consequence is that lobstr no longer reports the truelength property of vectors.

  We also changed the named indicator to refs:n, where n can take the values: 0 (corresponding to NO_REFERENCES returning 1), 1 (corresponding to both NO_REFERENCES MAYBE_SHARED returning 0), and 2+ (MAYBE_SHARED returning 1).