CRAN Version 2.3.10

CRAN Release 2.3.9

Fix for issue #124

Updated lexer to deal with #121

Emergency patch for as.yaml ... problem

CRAN release 2.3.4

Bump version to 2.2.1 (effective 2020-01-30)

Use SET_OBJECT when duplication function object for deparsing

Update date and changelog

Add date to DESCRIPTION, update changelog